Ravenheat 820/80T combi, working fine until yesterday when no DHW. The pilot remains lit but the boiler doesn't fire when hot tap turned on. Same problem when central heating turned on, ie DHW stays cold and boiler does not fire for CH either.
If I turn off the pilot and then relight it, the problem disappears only to re-appear about 1/2hr later.
If I hold the ignition for 20 secs (when pilot already on), the pilot goes out. (I did this as it was part of the Ravenheat troubleshooting algorithm- and it suggested it might be thermocouple or overheat thermostat of the gas valve.
No other problems,Pilot lights easily, CH pressure fine, no leaks, the pilot flame envelops the t/c.
On this model the thermocouple/overheatstat come as one so I was thinking about replacing this and if the problems is not solved I will call a CORGI engineer.
Any advice?
I know the wiser of you will suggest calling an engineer now rather than later but it is so difficult to get someone quickly and the main problem is working long hours and difficullty being there to let them in. Hence the logic of my suggestion to try fitting the relatively cheap t/c in the first instance.
Thanks in advance
Michael
If I turn off the pilot and then relight it, the problem disappears only to re-appear about 1/2hr later.
If I hold the ignition for 20 secs (when pilot already on), the pilot goes out. (I did this as it was part of the Ravenheat troubleshooting algorithm- and it suggested it might be thermocouple or overheat thermostat of the gas valve.
No other problems,Pilot lights easily, CH pressure fine, no leaks, the pilot flame envelops the t/c.
On this model the thermocouple/overheatstat come as one so I was thinking about replacing this and if the problems is not solved I will call a CORGI engineer.
Any advice?
I know the wiser of you will suggest calling an engineer now rather than later but it is so difficult to get someone quickly and the main problem is working long hours and difficullty being there to let them in. Hence the logic of my suggestion to try fitting the relatively cheap t/c in the first instance.
Thanks in advance
Michael