Boiler Advice

Quick answer: The C6 fault code (often shown as C6 215 or C6 216) means your Worcester Bosch boiler has detected the fan running outside its safe speed range, either too fast or too slow. The fan controls how air and flue gases move through the combustion chamber, so the boiler locks out rather than

Quick answer: The A21 fault code means your Worcester Bosch boiler has lost the radio signal between your wireless room thermostat and the receiver on the boiler. Nine times out of ten it’s flat batteries in the thermostat. This is one of the very few Worcester fault codes most homeowners can genuinely fix themselves, without

Quick answer: The F23 fault code (shown as F.23 on some displays) means your Vaillant boiler has detected too big a temperature difference between the flow pipe and the return pipe. The boiler has locked out on purpose to stop the heat exchanger cooking itself. In almost every case we attend across Edinburgh and central

The Baxi boiler e160 error code points to a problem with the fan or its wiring. Your boiler has detected that the fan is not spinning properly or at the right speed, so it shuts down to stop any risk of unsafe gases building up inside the home.  This is one of the more common