What does the Baxi Platinum F88 fault code mean?
The F88 fault code on a Baxi Platinum boiler indicates that the domestic hot water (DHW) supply temperature is too low. This can lead to insufficient hot water for taps and showers, causing inconvenience for users.
Common Causes
- Thermistor Failure: A faulty thermistor may not accurately measure the water temperature, leading to incorrect readings and low hot water supply.
- Blocked Heat Exchanger: A blockage in the heat exchanger can restrict the flow of water, preventing it from heating adequately.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling for safety reasons.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F88 fault could be around £150 to £250, primarily depending on whether the thermistor needs replacement or if the heat exchanger requires cleaning or servicing.