Right,
Everything was OK and then I noticed that when the Rads are up to tempertaure etc.... the boiler runs for 2 mins and then stops on supposedly reaching temperature! This cycle goes on forever or until you let all the rads cool right down.
I have proved out all the obvious stuff.. pump is OK and circulating water, Room stat is calling, Rad TRV's calling, water temperature sensor OK etc..... my latest theory is that the 3 way valve may be passing (slightly) and hot water is gong through the heat exchanger and back round the boiler heating loop.... hence heating up to temperature very quickly. The pipe into the heat exchanger from the 3 way valve is very hot
Has anyone else had this.... is it possible for the valve seats to get pitted etc..
Any help greatly appreciated
PS: I have also proved and set up Gas valve.... modulates fine ansd is set up fro the correct heat demand etc...
Everything was OK and then I noticed that when the Rads are up to tempertaure etc.... the boiler runs for 2 mins and then stops on supposedly reaching temperature! This cycle goes on forever or until you let all the rads cool right down.
I have proved out all the obvious stuff.. pump is OK and circulating water, Room stat is calling, Rad TRV's calling, water temperature sensor OK etc..... my latest theory is that the 3 way valve may be passing (slightly) and hot water is gong through the heat exchanger and back round the boiler heating loop.... hence heating up to temperature very quickly. The pipe into the heat exchanger from the 3 way valve is very hot
Has anyone else had this.... is it possible for the valve seats to get pitted etc..
Any help greatly appreciated
PS: I have also proved and set up Gas valve.... modulates fine ansd is set up fro the correct heat demand etc...