What does the Ideal Mini F44 fault code mean?
The F44 fault code on the Ideal Mini indicates a fault with the domestic hot water (DHW) thermistor. This typically means that the thermistor is either malfunctioning or has failed, preventing the boiler from accurately measuring the water temperature.
Common Causes
- Faulty Thermistor: The thermistor may be damaged or have an internal fault, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermistor can disrupt its function and cause the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as working with gas appliances can be dangerous and requires professional expertise.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the DHW thermistor on an Ideal Mini is around £120. This includes the cost of the part and labour, as the thermistor itself is relatively inexpensive, but professional installation is necessary for safety and compliance.