Worcester Bosch Boiler Fault Codes

Hot water NTC sensor defective.

Break in communication to the weather compensating clip-in control or Greenstar Comfort II RF.

Code plug not detected.

Fan speed too low.

Condensate pump fault.

CH flow NTC sensor defective.

Safety temperature limiter in the CH flow has tripped.

Flame not detected.

Internal error.

Flame detected even though the boiler is switched off.

Flame detected after gas shut off.

Reset button pressed by mistake.

Service required.

Boiler flow temperature is too high; the boiler will shut down until it has cooled down.

Boiler flow temperature is too high; the boiler will shut down until it has cooled down.

Boiler flow temperature is too high; the boiler will shut down until it has cooled down.

Flame not detected; the official user guide lists no/low gas supply, blocked condensate outlet and blocked flue as possible causes for the displayed EA fault.