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My boiler, an Apollo Fanfare 30/50 Si, is about 17 years old and will not start on its own. A sharp thump on the side of the casing will usually induce it to start up. I have lubricated the fan and this spins freely and the circulation pump appears to be working OK. If the pressure switch is...

Well that's it sorted - new air pressure switch bought and fitted. Central heating boiler working like a dream. Many thanks to Slugbabydotcom for your invaluable suggestions

I think we have cracked it! I blew into the tube connected to the APS (my boiler only has one tube connected to the APS) and yes there was a faint clicking sound, but I was not convinced that it was the microswitch and not just through friction from the diaphragm mechanism. The switch is...

I tried connecting a wire across the limit stat (I assume that this is the same thing as is labelled on the wiring diagram as "overheat cut off device") but it did not solve the problem. However I found that if I gave the pressure switch a sharp tap with the handle of my screw driver that the...

I have had problems with the fan in the past when it was too stiff to start but some penetrating oil in the bearing freed it. It spins freely at the moment and is not excessively noisy. There are three thermostats on the flow pipe and I don't know which is the limit stat. If I run the boiler...

Just tried running the heating on low, but it didn't help, again the flame went out after about 5 minutes.

My boiler will run for about 5 minutes during which time the radiators start to heat up, then the flame cuts out and the boiler sounds as though it is still running as the flue fan is still working and warm air is blowing out of the flue (the heat exchanger is now effectively working in...

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