37
FAULT CODE
Alpha
Low Supply Voltage
Medium Severity
Engineer Required
The mains power supply voltage has dropped below the minimum operating level for the boiler.
Step-by-Step Fix Guide
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Step 1
Check with an electrician that the mains supply is within specification (230V)
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Step 2 Engineer only
If mains is correct, call a Gas Safe engineer as the boiler's power supply circuitry may be faulty
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.