E19 High
Your boiler has shut down because the water returning from your radiators is too hot, which usually means the water isn't flowing through your system correctly.
Technical description: Maximum return temperature exceeded – check circulation
Typical repair cost: £100-280 (including labour)
DIY fix possible
Check that at least two or three radiators have their valves turned fully to the open positionEnsure all radiator valves (TRVs) are not stuck in the closed positionReset the boiler using the 'Reset' button on the control panel
Protect yourself from future repair bills
A boiler cover plan would cover faults like E19 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation Pump
- Return Temperature Sensor (NTC)
- Main Heat Exchanger (if blocked)
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