What does the Glow-worm Ultimate E119 fault code mean? The E119 fault code on the Glow-worm Ultimate boiler indicates low water pressure within the system. This can lead to insufficient heating and hot water supply, requiring immediate attention to restore normal operation. Common Causes Water Leak: A leak in the heating system can cause a … Read more
What does the Glow-worm Ultimate F100 fault code mean? The F100 fault code indicates a domestic hot water (DHW) temperature warning, suggesting that the water temperature is exceeding safe limits. This can lead to potential overheating issues within the boiler system. Common Causes Thermostat Malfunction: A faulty thermostat may not accurately read the water temperature, … Read more
What does the Glow-worm Ultimate F101 fault code mean? The F101 fault code indicates a domestic hot water (DHW) pressure warning, which suggests that the pressure in the system is too low for the boiler to operate effectively. This can lead to insufficient hot water supply and may require immediate attention to prevent further issues. … Read more
What does the Glow-worm Ultimate F102 fault code mean? The F102 fault code indicates a domestic hot water (DHW) electrical warning, suggesting that there is an issue with the electrical components responsible for heating the water. This could be due to a fault in the wiring, a malfunctioning sensor, or a problem with the control … Read more
What does the Glow-worm Ultimate F103 fault code mean? The F103 fault code indicates a warning related to the Domestic Hot Water (DHW) Printed Circuit Board (PCB) in the Glow-worm Ultimate boiler. This typically signifies a malfunction or communication issue within the PCB that controls the hot water function. Common Causes PCB Failure: The PCB … Read more
What does the Glow-worm Ultimate F22 fault code mean? The F22 fault code on the Glow-worm Ultimate indicates a dry fire condition or low water pressure within the system. This typically means that the boiler is unable to detect sufficient water flow, which can lead to overheating and potential damage. Common Causes Low Water Pressure: … Read more
What does the Glow-worm Ultimate F23 fault code mean? The F23 fault code on the Glow-worm Ultimate indicates a flame failure, meaning the boiler is unable to detect a flame during operation. This can lead to the boiler shutting down to prevent unsafe conditions. Common Causes Insufficient Gas Supply: A blockage or issue in the … Read more
What does the Glow-worm Ultimate F24 fault code mean? The F24 fault code on the Glow-worm Ultimate indicates an overheat condition within the boiler. This typically occurs when the temperature of the water in the system exceeds safe operating limits, triggering a safety mechanism to prevent damage. Common Causes Blocked Heat Exchanger: A build-up of … Read more
What does the Glow-worm Ultimate F25 fault code mean? The F25 fault code on the Glow-worm Ultimate indicates an ignition failure, meaning the boiler is unable to ignite the gas to start the heating process. This can lead to the boiler shutting down to prevent unsafe conditions. Common Causes Faulty Ignition Electrode: The ignition electrode … Read more
What does the Glow-worm Ultimate F26 fault code mean? The F26 fault code on the Glow-worm Ultimate indicates a fan fault, which typically means that the fan is not operating correctly or is not detected by the boiler’s control system. This issue can prevent the boiler from functioning properly, leading to heating and hot water … Read more
What does the Glow-worm Ultimate F27 fault code mean? The F27 fault code on the Glow-worm Ultimate indicates a water flow fault, which typically means that the boiler is not detecting adequate water flow through the system. This can lead to overheating and potential damage if not addressed promptly. Common Causes Blocked Filter: A blockage … Read more
What does the Glow-worm Ultimate F28 fault code mean? The F28 fault code on a Glow-worm Ultimate boiler indicates a failure to ignite, which can prevent the boiler from heating water or providing central heating. This issue typically arises from problems with the gas supply or ignition components. Common Causes Gas Supply Issue: There may … Read more
What does the Glow-worm Ultimate F29 fault code mean? The F29 fault code on the Glow-worm Ultimate indicates a flame detection fault, meaning the boiler is unable to detect a flame during operation. This can prevent the boiler from firing up or maintaining operation, leading to heating and hot water issues. Common Causes Faulty Flame … Read more
What does the Glow-worm Ultimate F30 fault code mean? The F30 fault code on the Glow-worm Ultimate indicates a thermistor fault, which typically means that the temperature sensor is malfunctioning or has failed. This can lead to incorrect temperature readings and affect the boiler’s operation. Common Causes Faulty Thermistor: The thermistor may be damaged or … Read more
What does the Glow-worm Ultimate F31 fault code mean? The F31 fault code on the Glow-worm Ultimate indicates a pump fault, which typically means that the central heating pump is not functioning correctly. This can lead to inadequate circulation of water within the heating system, resulting in heating issues. Common Causes Blocked Pump: Debris or … Read more
What does the Glow-worm Ultimate F32 fault code mean? The F32 fault code on the Glow-worm Ultimate indicates a gas valve fault, which typically signifies that the boiler is unable to regulate gas flow properly. This can lead to issues with heating and hot water supply. Common Causes Faulty Gas Valve: The gas valve may … Read more
What does the Glow-worm Ultimate F33 fault code mean? The F33 fault code on a Glow-worm Ultimate boiler indicates a high temperature limit fault, which means that the boiler has detected that the water temperature has exceeded safe operating limits. This safety feature prevents overheating and potential damage to the system. Common Causes Blocked Heat … Read more
What does the Glow-worm Ultimate F34 fault code mean? The F34 fault code indicates a low temperature limit fault in the Glow-worm Ultimate boiler. This typically means that the boiler is unable to maintain the required water temperature, which can affect heating efficiency. Common Causes Faulty Temperature Sensor: A malfunctioning temperature sensor may not accurately … Read more
What does the Glow-worm Ultimate F35 fault code mean? The F35 fault code indicates a system pressure fault, which typically means that the boiler’s water pressure is either too low or too high. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly. Common Causes Low Water … Read more
What does the Glow-worm Ultimate F36 fault code mean? The F36 fault code on the Glow-worm Ultimate indicates an electrical fault within the boiler’s system. This can affect the boiler’s ability to operate correctly, leading to heating and hot water issues. Common Causes Wiring Issues: Damaged or loose wiring connections can disrupt the electrical flow, … Read more
What does the Glow-worm Ultimate F37 fault code mean? The F37 fault code on the Glow-worm Ultimate boiler indicates a fault with the printed circuit board (PCB). This issue can disrupt the boiler’s operation, leading to heating and hot water failures. Common Causes PCB Failure: The PCB may have developed a fault due to age, … Read more
What does the Glow-worm Ultimate F38 fault code mean? The F38 fault code on the Glow-worm Ultimate indicates a sensor fault, typically related to the temperature or pressure sensors within the boiler. This issue can prevent the boiler from operating efficiently or at all, requiring attention to ensure safe and effective heating. Common Causes Faulty … Read more
What does the Glow-worm Ultimate F39 fault code mean? The F39 fault code indicates a fault with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This issue can prevent the boiler from properly heating water for taps and showers. Common Causes DHW Sensor Failure: The sensor may be malfunctioning or damaged, leading … Read more
What does the Glow-worm Ultimate F40 fault code mean? The F40 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) flow fault, which typically means that the boiler is unable to detect or maintain the required flow of hot water. This can lead to insufficient hot water supply for taps and showers. … Read more
What does the Glow-worm Ultimate F41 fault code mean? The F41 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) overheat condition. This typically occurs when the temperature of the water exceeds safe operating limits, potentially leading to system damage or safety risks. Common Causes Thermostat Failure: A malfunctioning thermostat may not … Read more
What does the Glow-worm Ultimate F42 fault code mean? The F42 fault code on the Glow-worm Ultimate boiler indicates a fault with the domestic hot water (DHW) thermistor. This component is responsible for measuring the temperature of the water, and a fault can lead to issues with hot water delivery. Common Causes Faulty DHW Thermistor: … Read more
What does the Glow-worm Ultimate F43 fault code mean? The F43 fault code on the Glow-worm Ultimate indicates a fault with the domestic hot water (DHW) pump. This typically means that the pump is either not operating correctly or has failed, affecting the boiler’s ability to provide hot water. Common Causes Blocked DHW Pump: Debris … Read more
What does the Glow-worm Ultimate F44 fault code mean? The F44 fault code on the Glow-worm Ultimate indicates a fault with the domestic hot water (DHW) valve. This typically means that the valve is not operating correctly, which can prevent hot water from being delivered. Common Causes Faulty DHW Valve: The valve may be stuck … Read more
What does the Glow-worm Ultimate F45 fault code mean? The F45 fault code indicates a problem with the domestic hot water (DHW) flow switch in the Glow-worm Ultimate boiler. This fault typically means that the boiler is unable to detect water flow, which can prevent it from heating water effectively. Common Causes Blocked Flow Switch: … Read more
What does the Glow-worm Ultimate F46 fault code mean? The F46 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) temperature fault, which suggests that the boiler is unable to achieve or maintain the desired temperature for hot water. This can lead to inadequate hot water supply for taps and showers. Common … Read more
What does the Glow-worm Ultimate F47 fault code mean? The F47 fault code indicates a domestic hot water (DHW) pressure fault in the Glow-worm Ultimate boiler. This typically means that the system is unable to maintain the required pressure for hot water delivery, which can affect performance and efficiency. Common Causes Low Water Pressure: Insufficient … Read more
What does the Glow-worm Ultimate F48 fault code mean? The F48 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) electrical fault. This typically suggests an issue with the wiring or components related to the DHW system, which may prevent the boiler from providing hot water. Common Causes Wiring Issues: Damaged or … Read more
What does the Glow-worm Ultimate F49 fault code mean? The F49 fault code on the Glow-worm Ultimate indicates a fault with the Domestic Hot Water (DHW) PCB. This typically suggests an issue with the electronic control board responsible for managing hot water delivery. Common Causes PCB Failure: The printed circuit board may have developed a … Read more
What does the Glow-worm Ultimate F50 fault code mean? The F50 fault code indicates a failure of the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This sensor is crucial for accurately measuring the temperature of the water being heated for domestic use. Common Causes Faulty DHW Sensor: The sensor may be malfunctioning … Read more
What does the Glow-worm Ultimate F51 fault code mean? The F51 fault code on the Glow-worm Ultimate indicates a failure of the domestic hot water (DHW) thermistor. This component is responsible for measuring the temperature of the water, and its malfunction can lead to issues with hot water supply. Common Causes Faulty Thermistor: The thermistor … Read more
What does the Glow-worm Ultimate F52 fault code mean? The F52 fault code on the Glow-worm Ultimate indicates a failure of the domestic hot water (DHW) pump. This issue can prevent the boiler from effectively supplying hot water, leading to inconvenience and potential further damage if not addressed promptly. Common Causes Blocked DHW Pump: Debris … Read more
What does the Glow-worm Ultimate F53 fault code mean? The F53 fault code on the Glow-worm Ultimate indicates a failure in the domestic hot water (DHW) valve. This issue can prevent the boiler from supplying hot water effectively. Common Causes Faulty DHW Valve: The valve may be stuck or malfunctioning, preventing proper operation. Electrical Issues: … Read more
What does the Glow-worm Ultimate F54 fault code mean? The F54 fault code on the Glow-worm Ultimate indicates a failure of the domestic hot water (DHW) flow switch. This issue prevents the boiler from detecting water flow, which can disrupt hot water supply. Common Causes Faulty Flow Switch: The flow switch may be defective or … Read more
What does the Glow-worm Ultimate F55 fault code mean? The F55 fault code on the Glow-worm Ultimate indicates a failure in the domestic hot water (DHW) temperature regulation. This typically means that the boiler is unable to achieve or maintain the desired water temperature for hot water supply. Common Causes Faulty DHW Sensor: The temperature … Read more
What does the Glow-worm Ultimate F56 fault code mean? The F56 fault code indicates a domestic hot water (DHW) pressure failure in the Glow-worm Ultimate boiler. This typically means that the system is unable to maintain the required pressure for hot water delivery, which can affect performance. Common Causes Low Water Pressure: Insufficient water pressure … Read more
What does the Glow-worm Ultimate F57 fault code mean? The F57 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) electrical failure. This typically suggests an issue with the electrical components responsible for heating water, which may affect the boiler’s ability to provide hot water. Common Causes Faulty DHW Sensor: A malfunctioning … Read more
What does the Glow-worm Ultimate F58 fault code mean? The F58 fault code on the Glow-worm Ultimate indicates a failure in the Domestic Hot Water (DHW) PCB (Printed Circuit Board). This issue typically affects the boiler’s ability to provide hot water, necessitating a diagnosis and potential replacement of the PCB. Common Causes PCB Failure: The … Read more
What does the Glow-worm Ultimate F59 fault code mean? The F59 fault code indicates a malfunction of the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This issue can prevent the boiler from accurately detecting the temperature of the water, leading to potential heating problems. Common Causes Faulty DHW Sensor: The sensor may … Read more
What does the Glow-worm Ultimate F60 fault code mean? The F60 fault code on the Glow-worm Ultimate indicates a malfunction with the domestic hot water (DHW) thermistor. This component is responsible for measuring the temperature of the water, and a fault can disrupt the boiler’s ability to provide hot water. Common Causes Faulty DHW Thermistor: … Read more
What does the Glow-worm Ultimate F61 fault code mean? The F61 fault code indicates a malfunction of the domestic hot water (DHW) pump in the Glow-worm Ultimate boiler. This issue can prevent the boiler from effectively heating water for taps and showers. Common Causes Blocked DHW Pump: Debris or limescale buildup can obstruct the pump, … Read more
What does the Glow-worm Ultimate F62 fault code mean? The F62 fault code on a Glow-worm Ultimate boiler indicates a malfunction with the domestic hot water (DHW) valve. This issue can prevent the boiler from properly supplying hot water, affecting the overall performance of the heating system. Common Causes Faulty DHW Valve: The valve may … Read more
What does the Glow-worm Ultimate F63 fault code mean? The F63 fault code on the Glow-worm Ultimate indicates a malfunction with the domestic hot water (DHW) flow switch. This issue typically prevents the boiler from properly detecting water flow, which can disrupt hot water supply. Common Causes Blocked Flow Switch: Debris or mineral build-up can … Read more
What does the Glow-worm Ultimate F64 fault code mean? The F64 fault code indicates a malfunction in the domestic hot water (DHW) temperature sensor or system. This can lead to issues with the boiler’s ability to heat water to the desired temperature. Common Causes Faulty DHW Temperature Sensor: The sensor may be malfunctioning or damaged, … Read more
What does the Glow-worm Ultimate F65 fault code mean? The F65 fault code on the Glow-worm Ultimate indicates a malfunction related to the domestic hot water (DHW) pressure. This typically suggests that the pressure sensor is not detecting the correct water pressure, which can affect the boiler’s ability to provide hot water. Common Causes Low … Read more
What does the Glow-worm Ultimate F66 fault code mean? The F66 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) electrical malfunction. This typically points to issues with the wiring or components responsible for the hot water system’s operation. Common Causes Wiring Issues: Damaged or loose wiring connections can disrupt the electrical … Read more
What does the Glow-worm Ultimate F67 fault code mean? The F67 fault code on the Glow-worm Ultimate indicates a malfunction in the Domestic Hot Water (DHW) PCB (Printed Circuit Board). This issue typically affects the boiler’s ability to provide hot water efficiently. Common Causes PCB Failure: The PCB may have developed a fault due to … Read more
What does the Glow-worm Ultimate F68 fault code mean? The F68 fault code indicates a problem with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This error suggests that the sensor is either malfunctioning or not providing accurate temperature readings. Common Causes Faulty DHW Sensor: The sensor may be damaged or defective, … Read more
What does the Glow-worm Ultimate F69 fault code mean? The F69 fault code indicates a problem with the domestic hot water (DHW) thermistor, which is responsible for measuring the temperature of the water. This error suggests that the thermistor may be faulty or there is an issue with its connection. Common Causes Faulty Thermistor: The … Read more
What does the Glow-worm Ultimate F70 fault code mean? The F70 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) pump. This error typically signifies that the pump is either malfunctioning or not receiving the necessary power to operate. Common Causes Faulty DHW Pump: The pump may have failed … Read more
What does the Glow-worm Ultimate F71 fault code mean? The F71 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) valve, which may be stuck or malfunctioning. This can prevent the boiler from supplying hot water effectively. Common Causes Stuck DHW Valve: The valve may be physically stuck due … Read more
What does the Glow-worm Ultimate F72 fault code mean? The F72 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) flow switch. This error typically means that the boiler is unable to detect the flow of water, which can prevent it from heating water properly. Common Causes Blocked Flow … Read more
What does the Glow-worm Ultimate F73 fault code mean? The F73 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) temperature error, which typically means that the boiler is unable to achieve or maintain the desired water temperature. This can lead to insufficient hot water supply for taps and showers. Common Causes … Read more
What does the Glow-worm Ultimate F74 fault code mean? The F74 fault code indicates a domestic hot water (DHW) pressure error in the Glow-worm Ultimate boiler. This typically means that the pressure in the system is either too low or too high, affecting the boiler’s ability to provide hot water efficiently. Common Causes Low Water … Read more
What does the Glow-worm Ultimate F75 fault code mean? The F75 fault code on the Glow-worm Ultimate boiler indicates a domestic hot water (DHW) electrical error, which typically points to a malfunction in the DHW sensor or wiring issues. This error can prevent the boiler from providing hot water, affecting overall performance. Common Causes DHW … Read more
What does the Glow-worm Ultimate F76 fault code mean? The F76 fault code on the Glow-worm Ultimate indicates a fault with the Domestic Hot Water (DHW) PCB, which is responsible for controlling the hot water supply. This error typically suggests a malfunction in the electronic control board that manages the hot water function. Common Causes … Read more
What does the Glow-worm Ultimate F77 fault code mean? The F77 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) sensor. This issue typically affects the boiler’s ability to accurately measure water temperature, leading to potential heating inefficiencies. Common Causes DHW Sensor Failure: The sensor may be faulty or … Read more
What does the Glow-worm Ultimate F78 fault code mean? The F78 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) thermistor. This component is responsible for measuring the temperature of the water, and a fault can lead to issues with hot water supply. Common Causes Faulty DHW Thermistor: The … Read more
What does the Glow-worm Ultimate F79 fault code mean? The F79 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) pump. This issue can prevent the boiler from effectively circulating hot water, leading to inadequate hot water supply. Common Causes Blocked DHW Pump: Debris or scale buildup can obstruct … Read more
What does the Glow-worm Ultimate F80 fault code mean? The F80 fault code on the Glow-worm Ultimate indicates an issue with the domestic hot water (DHW) valve. This typically means that the valve is either stuck or not functioning correctly, preventing hot water from being delivered. Common Causes Stuck DHW Valve: The valve may be … Read more
What does the Glow-worm Ultimate F81 fault code mean? The F81 fault code on the Glow-worm Ultimate indicates an issue with the domestic hot water (DHW) flow switch. This typically means that the boiler is unable to detect water flow, which can prevent hot water from being produced. Common Causes Blocked Flow Switch: Debris or … Read more
What does the Glow-worm Ultimate F82 fault code mean? The F82 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) temperature, suggesting that the boiler is unable to heat the water to the required temperature. This can lead to insufficient hot water supply for taps and showers. Common Causes … Read more
What does the Glow-worm Ultimate F83 fault code mean? The F83 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) pressure issue, which typically means that the system is unable to maintain the required pressure for hot water delivery. This can lead to insufficient hot water supply or system shutdown. Common Causes … Read more
What does the Glow-worm Ultimate F84 fault code mean? The F84 fault code on the Glow-worm Ultimate indicates an electrical issue related to the domestic hot water (DHW) system. This typically suggests a problem with the wiring or components that control the DHW function. Common Causes Wiring Issues: Damaged or loose wiring connections can disrupt … Read more
What does the Glow-worm Ultimate F85 fault code mean? The F85 fault code on the Glow-worm Ultimate indicates a problem with the Domestic Hot Water (DHW) PCB (Printed Circuit Board). This issue can prevent the boiler from properly heating water for taps and showers. Common Causes PCB Failure: The PCB may have developed a fault … Read more
What does the Glow-worm Ultimate F86 fault code mean? The F86 fault code indicates a problem with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This alert suggests that the sensor is either malfunctioning or providing incorrect temperature readings, which can affect the boiler’s ability to heat water effectively. Common Causes DHW … Read more
What does the Glow-worm Ultimate F87 fault code mean? The F87 fault code indicates a problem with the domestic hot water (DHW) thermistor, which is responsible for measuring the temperature of the water. This alert suggests that the thermistor may be faulty or there is a wiring issue affecting its operation. Common Causes Faulty Thermistor: … Read more
What does the Glow-worm Ultimate F88 fault code mean? The F88 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) pump, which may not be operating correctly. This can lead to insufficient hot water supply and requires immediate attention to ensure proper functioning of the boiler. Common Causes Blocked … Read more
What does the Glow-worm Ultimate F89 fault code mean? The F89 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) valve. This alert suggests that the valve may be stuck or malfunctioning, preventing proper hot water flow. Common Causes Stuck DHW Valve: The valve may be physically stuck due … Read more
What does the Glow-worm Ultimate F90 fault code mean? The F90 fault code indicates a problem with the domestic hot water (DHW) flow switch, which may be stuck or malfunctioning. This prevents the boiler from detecting water flow, leading to a failure in providing hot water. Common Causes Blocked Flow Switch: Debris or mineral build-up … Read more
What does the Glow-worm Ultimate F91 fault code mean? The F91 fault code on the Glow-worm Ultimate indicates a Domestic Hot Water (DHW) temperature alert, suggesting that the water temperature is either too high or too low. This alert is a safety feature designed to prevent scalding or damage to the boiler. Common Causes Faulty … Read more
What does the Glow-worm Ultimate F92 fault code mean? The F92 fault code indicates a Domestic Hot Water (DHW) pressure alert, which signifies that the pressure in the system is either too low or too high. This can affect the boiler’s ability to provide hot water efficiently. Common Causes Low Water Pressure: This can occur … Read more
What does the Glow-worm Ultimate F93 fault code mean? The F93 fault code on the Glow-worm Ultimate indicates a domestic hot water (DHW) electrical alert, which suggests there is an issue with the electrical components related to the hot water system. This could involve a fault in the wiring, a malfunctioning sensor, or a problem … Read more
What does the Glow-worm Ultimate F94 fault code mean? The F94 fault code on the Glow-worm Ultimate indicates a fault with the Domestic Hot Water (DHW) PCB, which is responsible for controlling the hot water supply. This alert suggests that there may be an issue with the electronic control board that manages the hot water … Read more
What does the Glow-worm Ultimate F95 fault code mean? The F95 fault code indicates a problem with the domestic hot water (DHW) sensor in the Glow-worm Ultimate boiler. This warning suggests that the sensor is either malfunctioning or not providing accurate temperature readings, which can affect the boiler’s ability to heat water effectively. Common Causes … Read more
What does the Glow-worm Ultimate F96 fault code mean? The F96 fault code indicates a problem with the domestic hot water (DHW) thermistor, which is responsible for measuring the temperature of the water. This warning suggests that the thermistor may be faulty or there is an issue with the wiring or connections related to it. … Read more
What does the Glow-worm Ultimate F97 fault code mean? The F97 fault code indicates a warning related to the domestic hot water (DHW) pump. This typically suggests that the pump is either malfunctioning or not operating as intended, which can affect the heating of water in the system. Common Causes Blocked DHW Pump: Debris or … Read more
What does the Glow-worm Ultimate F98 fault code mean? The F98 fault code on the Glow-worm Ultimate indicates a warning related to the domestic hot water (DHW) valve. This typically suggests that there is an issue with the valve’s operation, which may affect the boiler’s ability to provide hot water. Common Causes Faulty DHW Valve: … Read more
What does the Glow-worm Ultimate F99 fault code mean? The F99 fault code on the Glow-worm Ultimate indicates a warning related to the domestic hot water (DHW) flow switch. This typically suggests that the flow switch is either malfunctioning or not detecting water flow correctly, which can affect the boiler’s ability to provide hot water. … Read more