Hello, my name is***** be patient whilst awaiting any responses as I'm not constantly available.Once the parts had been changed, did the plumber light the boiler and was it left in a lit state?
The plumber tried to light the boiler but the pilot wouldn't stay on
If the plumber has replace the equipment correctly, then there are three possible causes:
1. There is an air-lock in the gas supply pipe2. The new valve is faulty3. The new thermocouple is faulty
1. The pilot light burns strongly with the button depressed suggesting the gas supply is fine
2. We have tried 2 new gas valves and neither will keep pilot light on so probably gas valve is not to blame
Then the thermocouple... try using the old thermocouple
3. when plumber put back original gas valve and original thermocouple, pilot light did stay alight, but boiler didn't fire
Then the thermocouple is definitely to blame for the lack of pilot ..
Stupid question I know, but, he did fill the boiler?
Today the plumber left the boiler with a new gas valve fitted and the old thermocouple fitted, but pilot won't stay on
what do you mean 'fill the boiler'. Why should it be empty?
OK.. Rather than fill the boiler .. change that to check the pressure
Not as far as I know, but there has been nothing to suggest that water pressure would be a problem. There have not been any leaks.
I would be questioning the main-board as this controls the firing of the boiler, however, I'm going to opt-out of the question on the hope that someone who knows that boiler can respond to you...my kind regards
What do I do now? Wait for another expert?
Yes, there was no reason or need to rate me with Bad Service as I have not served you with Bad Service.. If you wait, another expert will come to your assistance.. one who knows your boiler with a little more familiarity
Sorry. First time I've used this. It kept insisting I had to make a rating!
Yes I still have the problem. Not sure there is a pcb on this model. It seems to be electro mechanical rather than electronic. The boiler is about 20 years old.
We have solved the problem now. How do I close this question?
It was a faulty original gas valve. The new gas valve has 2 positions for connecting the thermocouple. It was set for the wrong one. Sod's law. When the plumber spotted it and changed it, it worked straight away.