Worcester Bosch 28cdi Ignition Lockout

[creature]

Hi,
My current problem is Ignition Lockout on heating - but not on hot water. The boiler is a worcester Bosch 28cdi. The history follows...

We had a problem with the hot water not initiating the boiler, which got steadily worse, to the point where we had to run several taps to get it to initiate to eventually no amount of flow would do so. So we paid for a new inverter valve to be fitted. This seemed to work fine for a day, then became intermittent - running taps wouldn't initiate the boiler.

The fitter returned and discovered the thermistor was loose for the hot water so tightened the bracket/clip, and that only worked intermittently so he then fitted another thermistor from his box - of admittedly unknown origin, and that has since worked intermittently. He had suggested that if it stopped working I should get a new thermistor and fit it myself.

Meanwhile the intermittency of the burner firing changed to be also for the heating - the burner tries to fire repeatedly and fails and we get the flashing light. Today I have fitted a new thermistor, and now the hot water will initiate but the heating won't.

The hot water initiates the boiler every time I’ve tried and while the tap’s still running I can then put the heating on, but when I try and switch the heating on from scratch it goes through the click, whirr process repeatedly without the oomph of the boiler firing. click, whirr, stop, click, whirr, stop....and the led flashes slowly

Any help would be greatly appreciated.
Thanks
Tom

 

[shytalk]

Ever been serviced, sound like it might need one, by a different fella hopefully better.

 

[Whyme]

Sorry to say this but we cant give detailed info on what is an internal boiler problem for obvious reasons..i suggest you call somebody else up..good luck

 

[creature]

Sorry to say this but we cant give detailed info on what is an internal boiler problem for obvious reasons..i suggest you call somebody else up..good luck

erm...the reasons aren't obvious to me I'm afraid. I'm looking for a steer towards what the problem might be, because all 3 professionals who have dealt with it so far have left us with a boiler that doesn't work and no clue what the problem might be. Any help would be much appreciated. Anyone else?
Thanks
Tom

 

[Millsy 82]

I'd say get another engineer, get the thermistor swapped to a manufacturer and let them sort it.

Try posting up on here chances are somebody will be able to help you and there are some very knowledgable lads on here.

 

[creature]

I'd say get another engineer, get the thermistor swapped to a manufacturer and let them sort it.

Try posting up on here chances are somebody will be able to help you and there are some very knowledgable lads on here.

Thanks Millsy, The Thermistor has been swapped to a new manufacturer's one - which sorted the hot water problem, but now the heating won't fire.

If you first run the hot tap the boiler will fire then the heating will run too, but as soon as you switch the hot tap off, the burner stops, and ignition lockout light flashes.

So to be clear:

• Burner fires for hot water demand
• Burner won't fire for heating demand - ignition lockout light
• heating will run as long as hot water is on - stops when hot water off

Any clues would be useful.
Thanks

 

[Aquazone]

We can't give clues as to what the problem might be, because some people (not saying your one of them) will think "how hard can it be?" And have a go at a DIY gas repair.

I understand some engineers say they can repair your boiler but are then stumped. This is why we have a section called "Looking for an Engineer". All the lads on this forum are good at their jobs and will do their utmost to fix your boiler.

 

[Dotty]

Forum rules apply.

Thread closed.