Vaillant Diverter Valve
Vaillant Diverter Valve
Fault codes F61, F62, and F65 are often related to a gas valve or diverter valve issue on a Vaillant boiler. F61 indicates a problem with gas valve regulation, while F62 points to a delayed switch-off of the gas valve. F65 is a more general electronics fault code that can involve overheating, which may or may not be related to the gas valve.
Fault Code
Meaning
Potential Causes
F61
Gas valve regulation fault.
Gas valve defective, short circuit in the cable harness, or a defective printed circuit board (PCB).
F62
Gas valve switch-off delay.
The gas valve is slow to shut off, or the flame signal is delayed. This could be due to a leaking gas valve or a defective PCB.
F65
Electronic temperature fault.
The electronics are overheating due to external influences. This could be a sign of a larger issue, but the gas valve can be affected by overheating.
F60
Gas valve control defective.
This code indicates a problem with the gas valve control, which could be a defective gas valve assembly, a short circuit in the cable, or a PCB issue.
Important Note: It is recommended to contact a Gas Safe registered engineer to safely diagnose and fix any issues related to gas or diverter valves. Do not attempt to repair these components yourself, as it can be dangerous.
