BoilerFaultCodesTechnical description
Blocked pilot filter
What causes this fault?
This fault occurs when the tiny hole that allows gas to reach the pilot light becomes restricted by a buildup of household dust or soot. Because the pilot flame cannot stay strong enough to heat the safety sensor, the boiler fails to ignite the main burner as a security precaution.
This issue is frequently seen in autumn when boilers are turned on for the first time after being inactive all summer, as settled dust is more likely to cause a blockage.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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