I normall only turn on one central heating at a time upstairs or downstairs but when accidentally both are on, the minute that happens my water heater pilot goes off. This is proven fact.
I can only think not enough gas as they are all using gas but I have no idea, that was wild guess.
Any idea to this madness? I have searched for any related issues and I have not able to find yet.
If you know solution please share, thanks