High
Overheat LED illuminated on Halstead Wickes Combi 82/102

Your boiler has detected that it is running much hotter than it should be and has shut itself down as a safety precaution to prevent damage.

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.

What the manual says

Manufacturer manual

Investigate the cause of the overheat situation and rectify. Possible causes: Lack of water; Lack of water flow; Faulty overheat thermostat; Faulty thermistor; Faulty aquastat

From this model's manual
Verified against the Halstead Best Db 80 Installation Manual 41 333 56 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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