Is my Potterton Mini Minder Control faulty??

the pilot light is whats there to light the boiler up.
the problem is the gas valve is not opening up for the main burner.
basically when your programmer calls for heat via stats, live should be sent to boiler thermostat and providing its not satisfied, live will be sent on to gas valve to open up and allow gas to burner. it would involve tracing how far power is getting along the line.

make sure programmer is switching power
stats are callling
boiler stat is calling
power is getting to gas valve

z
April 2008