BAXI COMBI 105 HE

[PB67]

Hi I have a baxi that has a strange fault the boiler fires ok and runs in the heating mode for about an hour then it goes out with the fault light looking towards an air /fan fault. if i reset using the switch it fires up and runs for about another hour give or take. then goes out
i have looked at the pressure switch and it seams to be working
has anyone else had this one

any help would be appreciated

Thanks

 

[ChrisR]

Yep loadsa times. PCB usually needs replacing. 248074 , replaced by 5112380.

 

[PB67]

thanks For that Chris any way of checking for sure before the big cash handover ?

 

[ChrisR]

If youhave an analogue voltmeter, put it on the fan terminals on the pcb. If you get a little pulse when the fan should be starting, that's a dead-pcb "signature".

Obviously if it says faulty XYZ then it could always be telling the truth!

 

[Vic Spanner]

Beware this is a HE boiler and will already have a 5112380 pcb fitted. Venturi ,aps and tubes need to be checked first.

 

[virdias]

Hi I have a baxi that has a strange fault the boiler fires ok and runs in the heating mode for about an hour then it goes out with the fault light looking towards an air /fan fault.


Hi PB67,

I had a new system about 2.5 years ago and it has started to display the same fault. What was the solution?

Thanks.