What does the Baxi Platinum F87 fault code mean?
The F87 fault code on a Baxi Platinum boiler indicates that the central heating (CH) return temperature is too low, which can prevent the boiler from operating efficiently. This issue may lead to inadequate heating and can affect the overall performance of the system.
Common Causes
- Low System Water Pressure: Insufficient water pressure can cause the return temperature to drop, leading to the F87 fault code.
- Blocked or Dirty Heat Exchanger: A buildup of debris in the heat exchanger can restrict water flow, resulting in low return temperatures.
Can I fix it myself? (DIY)
If you are comfortable, check the system pressure and ensure it is within the recommended range (typically 1-1.5 bar). If the pressure is low, you can top it up using the filling loop. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F87 fault could be around £150 to £250, depending on whether the issue is simply a pressure adjustment or requires cleaning or replacing the heat exchanger.