Hi,
My 1994 Worcester 280RSF has started playing up.
When a hot tap is opened, the demand light comes on, the fan and pump run, the pilot gas valve opens, the ignition sparks and the pilot lights and stays lit. So far so good.
BUT the sparking just carries on and the main gas valve stays closed, so nothing gets hot (obviously!).
Any suggestions? In particular, does anyone know how the ignition board senses that the pilot's lit? I can't work it out, even with the excellent technical manual.
The ignition electrode and wire seem to be in good shape and the spark is nice and healthy. The ignition board looks fine with no signs of overheating, bad solder joints, water damage etc.
Hope someone clever can help
Cheers.
My 1994 Worcester 280RSF has started playing up.
When a hot tap is opened, the demand light comes on, the fan and pump run, the pilot gas valve opens, the ignition sparks and the pilot lights and stays lit. So far so good.
BUT the sparking just carries on and the main gas valve stays closed, so nothing gets hot (obviously!).
Any suggestions? In particular, does anyone know how the ignition board senses that the pilot's lit? I can't work it out, even with the excellent technical manual.
The ignition electrode and wire seem to be in good shape and the spark is nice and healthy. The ignition board looks fine with no signs of overheating, bad solder joints, water damage etc.
Hope someone clever can help
Cheers.