BoilerFaultCodesYour boiler has switched itself off because it has detected that the exhaust gases are becoming too hot, which is a safety feature to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flue thermostat sensor tripped (lockout)
What causes this fault?
This fault occurs when the temperature of the exhaust gases exceeds safe limits, triggering a safety sensor to prevent the plastic internal components from melting. The most common cause is a buildup of debris or lime-scale inside the heat exchanger, which prevents heat from being transferred to the water and pushes it out through the flue instead. It can also be caused by a damaged internal insulation panel or a faulty sensor giving an incorrect reading.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like E130 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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