What does the Ideal Mini F64 fault code mean?
The F64 fault code on the Ideal Mini indicates a central heating system fault, typically related to issues with the flow or return temperature sensors. This code suggests that the boiler is unable to maintain the required temperature for efficient operation.
Common Causes
- Faulty Temperature Sensors: If the flow or return temperature sensors are malfunctioning, they may provide incorrect readings, leading to the F64 fault code.
- Blocked or Sludge-Ridden System: A build-up of sludge or debris in the heating system can restrict water flow, causing temperature discrepancies and triggering the fault code.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it may involve gas or electrical components that require professional expertise. Attempting to fix these issues without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the F64 fault could be around £150 to £250, depending on whether the temperature sensors need replacing or if the system requires flushing to remove blockages.