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Mend Raven 820/20 Central Heating Hot Water Temperature

pilot keeps going out on my raven heat 820/20?

can anyone help? the pilot light keeps going out when i use the hot water,it runs fine but when i turn the tap off the temperature goes to 70 c and knocks the pilot off. it works fine when the central heating is on. the system is about 14 years old.

john
April 2009
RavenRaven 820/20Heating, Home Heating SystemsCentral Heating Hot Water Temperature
Could be a Scaled Hot Water Heat Exchanger

Boiler Repairman - Ipswich
April 2009
check pump over run, if water not circulating the overheat stat will keep kicking the pilot out, also check the operation of the the diverter valve and micro switch if this is sticking and not shutting of the boiler will be firing still and no water ciculating, boiling the water

STE
April 2009

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