I have recently had a new Vaillant Combi boiler fitted and now, when the hot water is running in the kitchen, I have noticed that the flames on the cooker shrink dramatically, returning to normal when the hot water is turned off. I assume this is to do with gas pressure.
Is this normal? If not what is wrong and what can be done to remedy it?
Thanks
Is this normal? If not what is wrong and what can be done to remedy it?
Thanks