Combustion chamber seal leaking- what does this cause?

[hosburger]

I have a Baxi system 100 he plus with several faults.

When heating rads from cold to hot system pressure goes too high. Sometimes it goes to overheat lockout. Occasionally the boiler won't start at all and goes to ignition lockout. I am regularly topping up system pressure.

I have checked the spark electrode gap which is spot on. But noticed that the combustion chamber door seal is definately perished and letting by. Also the felt gasket behind the spark electrode and sensor is missing.

Could someone please explain exactly what a badly sealed chamber means and what it can cause. I am guessing that like an engine too much air will cause it to burn 'lean' and too hot ?

Many thanks in advance.

 

[Deleted member 105431]

you can get carbon monoxide leak and the aps may not meet it's trigger pressure. This is a job for a CORGI engineer!

 

[muggles]

Your first problem is most likely due to a blown or depressurised expansion vessel

The CC door seal fault will cause the products of combustion to leak out of the CC. This can, as dangermouse said, include carbon monoxide, which can kill you. And you can't smell carbon monoxide so it'll get you before you even know it.

You need a CORGI engineer to come in and sort you out.

 

[bengasman]

In the meantime, turn the boiler off completely