E90
FAULT CODE
Alpha
Pressure Switch Fault
High Severity
Engineer Required
The air pressure switch is not registering correctly — this switch confirms that the fan is running before allowing gas to flow.
Step-by-Step Fix Guide
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Step 1
This requires a Gas Safe engineer — do not attempt repairs
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Step 2 Engineer only
The pressure switch, fan, and associated pipework need professional inspection
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.