Chaffoteux Maury Combi 80 problem

[simontrillo]

Hi

I have a C & M Combi 80 boiler which has stopped working. When the hot tap is turned on the pump/fan runs but the boiler does not light. If I remove the case and then remove the inner sealed cover the boiler will light. As soon as I replace the sealed cover the flames go out.

Has anyone got any ideas what it could be?

Many Thanks.

Simon.

 

[ollski]

air pressure switch I should imagine, but a corgi job especially when you are breaking seals.

 

[simontrillo]

Thanks.

How much does a pressure switch cost?? Approx..

I think its made by Huba.

simon.

 

[ollski]

at the bottom of this page
http://www.keeptheheaton.com/acatalog/Chaffoteaux_Misc.html
Call them first though to make sure it is the right one.

 

[simontrillo]

Someone at work tells me they had a similar problem with thier boiler (not same make) and it was the venturi that was blocked. Is this possible/probable?

They said that they removed it and cleaned it out and it was fine after that.

Simon.

 

[namsag]

It might even be a slight blockage in one of the tubes leading to switch or where they connect to flue which is quite common on the chaff (doesn`t take much)

 

[ollski]

or a dirty heat exchanger, or a fading fan, or the pcb. That is why you need to get a heating engineer in, aside from the safety aspect you will probably end up just throwing parts at it only to find it could have been sorted for a fraction of the cost.

 

[simontrillo]

OK. Thanks everyone. Heating engineer it is.

Will let you know the outcome.

 

[simontrillo]

Problem solved......

Traced to a small piece of debris in the Venturi.

Removed that and hey presto .... back in business.

Thanks to everyone for their help and advice.

Simon.