Mynute 14SE - air pressure switch problem

[Chrisgy]

I went to a breakdown earlier which is not something I do too much I normally just install. Anyway the fan just runs constantly, I blew down the air pressure switch and it fires up. Blew it a few times to try and loosen it up, connected it back up but still not working. I've said it's the air pressure switch that needs replacing but there's been a leak of water in the boiler from a nut on the heat exchanger, could I be missing something that a leak would have caused?

 

[PuraTherm]

Hoses to the air switch are blocked with dust. The leaking heat exchanger is another problem. Depending on the age of the boiler and the severity of the leak, you may want to consider replacing the whole boiler.

 

[Chrisgy]

The leak just needed tightening up, blew through the hoses and it came on but the switch is down to be swapped anyway

 

[so-solar]

the outlet from the fan to the switch sounds blocked to be honest!

 

[Chrisgy]

Yeah I should have checked that really.. Is that being blocked something unusual to come across or do you often find them blocked? Just blowing down the tube back into the fan assembly should do the trick shouldn't it?

 

[Billy Bob Bob]

no being blocked is not un common,check your tubing for blockage and your ventures,check tubing for splits and the flue for blockages if all this checks out replace aps, aps are notoriously unreliable but check the basics first

 

[tackleburger]

I've had the same problem you take the APS off swap it boiler fires until you put the case on then back to square one only seems to be Vokeras and baxi pottertons I've seen these annoying faults. I cleaned it out thoroughly hoses as well still couldn't get it to work. Guy got a vokera engineer to sort it but I never actually found out what was wrong. Could have been a slight split in a hose never noticed it though.