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Mend Ravenheat Combi Boiler

ravenheat combi boiler ?

I`ve carried out numerous repairs to my combi over 12 years , but struggling with this one ... C / Heating seems OK , but hot water .. shower .. fires up fine and provides hot water for approx 3 minutes before shutting down for a minute , then firing up again ?? replaced air pressure switch .. no change ... is there a flow sensor ??

dave s
April 2011
my boiler is doing exactly the same been told that its the calcium in the boilers pipes from the water that causes it and the only answer is a new expansion tank £300/400 qiud or cut your losses and get a new boiler

stuart
April 2011
no .. its not just the shower , it does the same on tring to run a bath or running the sink tap .... could it be the hot water thermostat ? ?

dave s
April 2011
if it's just the shower causing this then the shower is not allowing enough h/water through check flow rate of shower clean shower head and check shower valve filters

brian
April 2011

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