High
Overheat light on Baxi Solo 3 PFL

Your boiler has become too hot and has automatically shut 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.

Technical description

The "overheat" indicator light will be illuminated if the appliance needs resetting. Any interruption to the electricity supply may cause the device to operate. Indicates an appliance or system fault if persistent.

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.

Find a Gas Safe engineer
Search the official register →

Related fault codes

LockoutView →

Related guides you might find useful

Banging / kettling / whistling noise

Each noise points to a different fault.

Read →

Radiators cold at the bottom

Sludge build-up — needs flushing, not bleeding.

Read →

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →