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R

richardd

ok,

i was called to the above boiler today. I was getting fault code for air pressure switch / fan.

As soon as i disconnected the clear tube from the fan to the APS the boiler started.

I done this 4/5 tkmes and it made the boiler start each time.

I assume the APS is working as i got it satisfied.

So would this be a blocked venturi preventing the tubes from given the APS activation.

I didnt have time to strip out the fan to check the venturi but I am returning tomorrow.
 
Good chance you have a blockage at the fan .... aren't these prone to water ingress filling up the fan?
 
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Blockage or as diamond says water ingress through the flue. Changed loads of pcbs on these blown by water ingress.
 

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