Wow, T&C plumbing sound very vague! "Change the air pressure switch"? It could be anything.....That was a stupid answer. Is the fan running?
Can you hear the click at the APS? Is there power to the gas valve? Is it sparking? T&C advise is a accident waiting to happen. Stick to fixing taps if you don't what your talking about!
A actual gas engineer., November 2010
