What does the Baxi Platinum F64 fault code mean?
The F64 fault code on a Baxi Platinum boiler indicates that the domestic hot water (DHW) flow rate is too low, which can prevent the boiler from heating water effectively. This issue can lead to inadequate hot water supply for taps and showers.
Common Causes
- Blocked Filters: Sediment or debris in the water filters can restrict flow, leading to low water pressure.
- Faulty Flow Sensor: A malfunctioning flow sensor may not accurately detect water flow, causing the boiler to shut down or limit hot water production.
Can I fix it myself? (DIY)
Before calling a Gas Safe Engineer, check and clean any filters that may be blocked. If the issue persists or involves gas or electrical components, it is crucial to contact a qualified professional for safety reasons.
Estimated Repair Cost (2026 UK Prices)
Repair costs for the F64 fault could range from £100 to £250, depending on whether a filter cleaning or flow sensor replacement is needed. The flow sensor replacement is typically more expensive due to part costs and labour.