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Mend Puma 100e Combi Central Heating Repair

How can I fix my Puma 100e combi boiler from constantly turning on and off?

I have monitored the running of the boiler for over 30 minutes and it fires up and stays on for 30 seconds then shuts down for 30 seconds and then starts up again. It is only affecting the Central heating side and not the hot water demand.

Ian C
March 2009
PumaPuma 100eHeating, Home Heating SystemsCombi Central Heating Repair
it is a faulty domestic hot water micro switch i have come across this problem many times

stew
March 2009
check the divertor valve run the hot water and see if flow pipe to the central heating gets hot

dave
March 2009

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Puma 100e Boiler Cycling - Fix Central Heating