IDEAL EVO HE - Bang on ignition

[hazydavy]

Our Evo HE seems to suffer with this explosive ignition when it goes through the regular cycle of heating up the water inside so that when we draw water it's instantly hot.

I've noticed we have a dripping hot tap - could this drip cause the boiler to call for gas, but not enough flow to light the burner and then when the burner does light, we have a small explosion due to the excess gas???

Thanks.

 

[Garfeild]

It wont be the tap,its likely to be the ignition probe bent,or the spark generator.

 

[tealey]

Had exactly the same problem on my Ideal Evo, it was a bent earth strip connected to the spark generator.

 

[45yearsagasman]

2 year old thread

 

[hazydavy]

Had exactly the same problem on my Ideal Evo, it was a bent earth strip connected to the spark generator.

I still have the problem. When the boiler bangs on ignition, I go up to the bathrooom and find a tap has not been turned off properly. Is it right that a dripping tap can start the ignition process so easily? So the boiler is trying to fire up, but there's not enough water flow to start it properly, then eventually the boiler does light and nearly comes off the wall!!!

 

[plumbplumb]

Yep. very sensitive to dripping taps these boilers.
The sensor in the cold inlet registers on a slight change in temp and fires the boiler up

 

[Boilerman2]

Agreed BUT it should not be the cause of explosive ignition, clearly that is a separate issue!!

 

[plumbplumb]

agreed agreed.
That is a separate issue which needs rectifying but not by a DIYer

 

[Boilerman2]

agreed agreed agreed!!