BoilerFaultCodesYour boiler has shut down because a sensor 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 negative thermistor coefficient (NTC) sensor operated
What causes this fault?
This fault occurs when the internal temperature of the exhaust gases exceeds a safe limit, triggering a safety shut-off to protect the boiler. The most common reasons are a build-up of debris or limescale inside the main heat exchanger which prevents heat from transferring to the water, or damaged internal insulation that is allowing too much heat to reach the sensor.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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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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