High Lockout
E32 on Keston C36

Your boiler has lost its ability to regulate hot water temperature correctly because of a wiring or sensor fault, meaning you likely have no hot water.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

DHW sensor short circuit – check connections to domestic hot water (DHW) sensor

What causes this fault?

This fault occurs when the boiler's internal computer receives an impossible electrical signal from the hot water temperature sensor. It typically happens because the sensor’s internal components have failed or the connecting wires have become damaged or loose, preventing the boiler from knowing how hot the water is.

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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Related fault codes

E31View →

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