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Mend Potterton Promax Combi 28HE Boiler Fault E133

fault on potterton promax combi 28he e1 33?

have changed high limit and worked 4 to 5 days but now fault back, wot now please

dean
September 2011
PottertonPotterton Promax Combi 28HEHeating, Home Heating SystemsBoiler Fault E133
spark electrode damaged it needs replacing

jon k
November 2011
e133 is a gas fault.

it could be no gas, low gas pressure, incorrect CO2 ratios, faulty gas valve, faulty ignition electrode, faulty spark generator, faulty flame sensing electrode or faulty pcb.

most likely it's the spark electrode, which may have bent due to explosive ignition if the CO2 ratios are incorrect, it's quite common and a service should sort it out.

Ian
September 2011

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