Ravenheat boiler problem

[yrob]

Hi,

I have a raveheat boiler at home of which has been in for 3 years. The problem I have is that the boiler itself has started cutting out when the inital ignite takes place.
The timer kicks in, the boiler starts making it's usual noise, no flame lights although the pilot is on and then the overheat light comes on.
Has anyone had this issue and if so what was the route to repair??

Thanks in advance.

 

[Agile]

It could be several things.

I suspect that you have not bothered to get it serviced every year or at all ?

It may well not be anything serious but now its failed completely and you will probably have to get a competent boiler engineer.

Tony

 

[yrob]

Thanks for the help Tony.

No it's not been serviced.

Was hoping that it may be something simple like the thermistor but guess that your advice will have to be taken..

 

[Agile]

Its most likely to be an ignition/combustion problem which should be dealt with by a competent CORGI.

Tony

 

[gas4you]

I think what you call the overheat lightis the ignition lock out.

Check fan is running, if so could be air pressure switch gone.

 

[yrob]

Just so I understand this correctly...

If the fan is running then it could be the pressure switch or is it if the fan is not running???

 

[gas4you]

If the fan won't run then test for 240V at the fan terminals.

If the fan is running ok then next thing to suspect is the aps.

 

[yrob]

After leaving the boiler off for the weekend I tried to fire it up last night. The fan comes on and after a few seconds the burner came on too. However, once the boiler got hot the overheat light kicks on and the flame cuts out. My manual tells me this could simply be down to a faulty overheat thermostat. Any one got any experience of this?

 

[gas4you]

Could be but I would ask why the normal stat is not shutting off the boiler before the over heat activates

 

[yrob]

Fair point - Is there a simple method of checking the stats - multimeter etc?

 

[yrob]

Don't know why but tonight the boiler is doing something different. The fan is on, the pilot lights (I can hear the gas valve click) but the burner will not ignite, in fact the overheat light comes on in 10 seconds??
This sounds like something simple but I am nervous about starting to buy any parts if their wrong???

 

[gas4you]

Still think it is ignition lock out rather than overheat. Now sounds like gas is not getting through and flame rectification is not being completed.

 

[yrob]

Ignition lockout - what can cause that, PCB issue perhaps?

 

[gas4you]

If possible you need to test for 230V at the gas valve whilst the boiler is attempting to light.

If there is 230V then it would point to the gas valve. If there isn't then I would suspect the pcb.

You need an expert eye over this as both bits will be expensive if you do not fault find correctly.

 

[yrob]

Got the expert out and he sorted in 15min. Basically he blew the just off the top of the burner/pilot. I had tried previously to do this but obviously I did not clean it enough. Bit cross really as it cost me £45 in the end - not bad for 15min ehh...