Need help! - No heating or hot water!

[Soggy_weetabix]

So, to summarise:

Boilers fan runs.
APS operates correctly.
Gas to pilot.
Pilot lights.

Now, what happens next?

Does boiler continue to spark?
Can you see if the pilot light correctly engulfs the electrode? (earthing bracket)

This could be as simple as a partially blocked pilot, but I cant advise you delve inside this boiler if your not competent. Potentially very dangerous boilers.

As I said before, any chance of reversy polarity. (240v on the neutral)

David

 

[gas4you]

on a side issue here, whilst outer case is off, check top of flue for corrosion, as these are prone to corroding badly and holeing which is then I.D

 

[nathanj]

After the pilot has lit nothing else happens. It stops sparking and the pilot light stays on.

It shouldn't reverse polarity because it hasn't been touched. Unless it could that be the result of the control unit going t1ts up.

I'll check for voltage going to the solenoid tonight and also the top of the flue.

 

[Soggy_weetabix]

If the g/vlv is at fauly, you can change the faulty coil on its own (but only if your CORGI man has an old netaheat gas valve with a working spare solenoid.)

The whole valve assy is quite expensive otherwise.

David

 

[Softus]

I now think that the problem is that the boiler is not firing up completely. I think it is just lighting the pilot light but nothing else.

Please don't think that I'm getting at you, but in your first post you said that the boiler was firing up, so has something changed?

 

[nathanj]

Sorry for the confusion. At first I didn't realise it had a pilot light. When I saw the flame, I thought it was the main burner. I thought that the spark lit the main burner when it was needed.

I now know that it has a pilot light and I've shone a torch in the window and I can see that the main burner is definately not lighting.

So, nothing has changed it's just that I was wrong to start with.

I've checked and I'm getting 240v going to the main burner solenoid on the gas valve so it looks like that's the problem. I'm looking into how much a new gas valve costs and then I'll get someone in to replace it.

All looked ok inside the casing, less corrosion than I was expecting.

It's a shame that I won't be able to replace just the solenoid. I've looked at the price of valves (but not specifically the one I need) and it looks like they're about £150. Anyone got any idea how long it would take the gasman to fit?

It's still going to be cheaper than a new boiler.