MAIN Combi 30 HE hot water but no heating

[GRAHAMSN]

Hi I am enquiring about a fault with a Main Combi 30 HE. The hot water supply is fine on demand but the heating seems to have a intermittent fault although no fault light is showing. When requested the heating will come on for about 2 - 6 minutes and then cut out. If you reset the same thing happens. The main temp thermostat has been replaced. When turning on the hot water tap this will cut out the heating as well.The pump is working ok. The timer is not interfering with operation mode. Before having the PCB replaced I would be grateful if you could confirm if there may be any other cause for this fault.

 

[Reg Man]

Sorry, but we can not and will not give advice relating to gas appliances, unless you are gas safe registered.

 

[Dotty]

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