Hi , problems with my boiler , all seems ok when we just demand DHW , i have had the tap running for 20 mins and all ok. When we put CH on , this can work from anything between 10mins to 1 hour , when the boiler locks out the indicator light is flashing once per second. After turning off boiler for approx 3 mins then restarting and resetting the boiler does restart ok , but when CH is demaned againg after a while it will lockout again.
Me trying to be logical and that the DHW seems ok has dismissed the gass pressure / gas valve / low water pressure / flame sensor / ignitor / APS as it all works OK for a while and works fine when only DHW is demaded. I am left with 2 options... a faulty pump ( i can hear the pump running ok NOT NOISY but it does feel hot to touch) or the Primary CH sensor located on the heat exchanger.
Is there any way to test these 2 items or am i going down the wrong road altogether and my logic is incorrect ???
Many thanks in advance for any help.
Me trying to be logical and that the DHW seems ok has dismissed the gass pressure / gas valve / low water pressure / flame sensor / ignitor / APS as it all works OK for a while and works fine when only DHW is demaded. I am left with 2 options... a faulty pump ( i can hear the pump running ok NOT NOISY but it does feel hot to touch) or the Primary CH sensor located on the heat exchanger.
Is there any way to test these 2 items or am i going down the wrong road altogether and my logic is incorrect ???
Many thanks in advance for any help.