F.54
FAULT CODE
Vaillant
Gas Pressure Too Low
High Severity
Engineer Required
The gas supply pressure to the boiler is below the minimum required for safe operation. Can be caused by a supply interruption, closed gas valve, or a fault with the gas meter.
Step-by-Step Fix Guide
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Step 1
Check that other gas appliances in the home are working
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Step 2
Ensure the gas isolation valve under the boiler (yellow handle pointing along the pipe) is open
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Step 3
If all gas appliances have lost supply, contact your gas supplier or Cadent on 0800 111 999
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Step 4 Engineer only
If only the boiler is affected, call a Gas Safe engineer
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.