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Vaillant F54 Fault Code

This page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. The following information, will take you through the fault finding sequence or steps, for rectifying a Vaillant Ecotec boiler with this fault code. Suggested solutions will be detailed further down the page.

Vaillant F54 / F.54 Fault Code

Meaning: This fault code suggests there is a fault in the gas supply. Usually this fault is accompanied by with a F.28 or F.29 Fault code.

Cause: According to Vaillant, there is insufficient gas supply to operate the unit. Gas isolator may be close on boiler or elsewhere. Also gas flow pressure may be too low.

Vaillant F54 / F.54 Fault Code Repair

The first and most simplest to check would be if the gas stop cock is fully open at the meter, near the boiler and anywhere else there may be any additional stop cocks.

Next would be to check if the check valve is working as it should. Solenoid testing equipment and multimeters may be required. If found faulty a replacement gas valve would be required.

Vaillant Gas Valve

Vaillant F54 / F.54 Fault Code Statistical Fault rate

Following are the approx percentage probability of the cause of a fault.

38 % – Gas Valve

31 % – Gas supply fault

29 % – Other causes ie pcb etc

 

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