BOILER IGNITES WHEN TOILET FLUSHED ! ! ! ! ! ! !

[DAJ]

Yes, you read the title right. When the cistern begins to fill, the boiler ignites for about a second. It's a Jaguar Combi. DO I NEED A PLUMBER OR AN EXORCIST ?

 

[ChrisR]

Common - air in pipe. It usually stops by itself. If not, you need a non return valve (and small expansion vessel usually, see the instrs ) on the input to the boiler.

 

[GrahamT]

Could be that it's been installed with the hot piped to the wc.
Feel the temp of the water

 

[Agile]

Thats the water going into the toilet cistern!

Some non quality plumbers connect them to the hot water!

Tony

 

[Paul Barker]

r u sure it's ignighting. Some boilers suffer from this as a minor inconvenience. When you run then shut off a cold tap the boiler starts the pump and fan but doesn't usually go as far as ignition. The first attempt at a fix is a check valve, and it works most of the time, then a small shock arrestor if check valve doesn't fix it alone. You then have the noise of the check valve to add to your worries. Still, keeps you fed with stuff to post.

Best solution is not to have a combi.