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Pressure switch is good. We ran through his vault finder but we had a "no" when the only option they gave was "yes". The blue box ignition switch housing has a couple of marks from scorching which have corresponding minor marks on the circuit board. One has a light brown mark and there is a...

Pump runs and the fan runs only when you turn on a tap or the C.H. The green light (fan?) is on whether the fan is running or not. The boiler won't ignite. It won't attempt to ingnite even manually. Had a mate down (Gas-safe boiler engineer) who has checked it all out. He's not 100% conversant...

Unplug them all then. According to a mate who is a Ford Tech it just resets the system, as does removing fuse 63.

Fixed the wife's today. Disconnected the Seimens' control box and tackled the fuse 63 whilst this was waiting the prescribed hour. A couple of tips on the fuse box. REMOVE the glove box, not merely swing it down. It is only 3 screws and gives a little more elbow room. Also remove the tape...

A rolling road will not give you the power at the flywheel. It measures the power at the wheels. You need a dyno for flywheel output. Tuning. I'm an ex-dragger and can tell you a lot of the expensive rubbish on sale will actually decrease your power. Tired cam and valves mean the valves don't...

The diaphram is fine, suck and blow on the tubes and there seem to be no leaks. The fan stays running if you squeeze either of the tubes and hold the pressure, but there is still no attempt to ignite.

Sime Friendly Format 100e c/h boiler has stopped working. Following sequence of events... Pump runs, fan runs, air pressure switch clicks, then fan stops after a couple of seconds. Fans starts and so on. It never tries to ignite. Gas present, elecs obviously, water pressure OK. Same on DHW and...