Potterton Profile 50e not sparking

[Michael29068]

Was the APS from a working boiler?

I have not got back to this boiler yet, when I do I am going to try a used PCB first and maybe then a used APS which I have taken off a working boiler which I have replaced with a new high efficiency condensing boiler. I have already blown down the APS tubes.

 

[ShaunCorbs]

did it fire?

 

[Michael29068]

did it fire?

did it fire?

No, it did not even start to spark.

 

[ShaunCorbs]

No, it did not even start to spark.

so that means it didnt sense the fan was running

 

[Michael29068]

so that means it didnt sense the fan was running

I dont know as I did not Voltage on T2 and T4 connections at the time

 

[Michael29068]

I dont know as I did not Voltage on T2 and T4 connections at the time

I left out word "check" between not and voltage

 

[SavageW]

Not 100%sure but Is there a Venturi on aps tube before aps, if there is check this? You may have already by passed this by blowing down the aps if you went straight on to the positive connection on it.If so got to be slow running fan or flue.
Had ridiculously high emissions from profile before an I put it down to glue & turned out to be slow running fan, could be same in your situation but the fans got to point where it won’t even operate the APS

 

[Michael29068]

Not 100%sure but Is there a Venturi on aps tube before aps, if there is check this? You may have already by passed this by blowing down the aps if you went straight on to the positive connection on it.If so got to be slow running fan or flue

 

[Michael29068]

Not 100%sure but Is there a Venturi on aps tube before aps, if there is check this? You may have already by passed this by blowing down the aps if you went straight on to the positive connection on it.If so got to be slow running fan or flue

I have checked the Venturi and it is not blocked, have alsolconnected a tube externally to APS to activate it

 

[SavageW]

Sounds more like APS then mate,can’t remember but is it a 3 wire or 2?
*just read you’ve already tried a new one,I’m out of ideas but be interesting to know how you get on

 

[Last Plumber]

Forgive me for not reading all this again.
Have you checked the obvious like spark gap, electrode, strike point, earthing, HT lead, etc

 

[SavageW]

Forgive me for not reading all this again.
Have you checked the obvious like spark gap, electrode, strike point, earthing, HT lead, etc

Earlier on he said that he wasnot getting a spark at all,even disconnecting HT lead from pcb an bridging from the pcb to a insulated screw driver

 

[Michael29068]

Forgive me for not reading all this again.
Have you checked the obvious like spark gap, electrode, strike point, earthing, HT lead, etc

I have checked all items you detailed and even had a friend of mine take a look at it. This friend works on gas appliances only. I hope to have another look at it over the next day or so.

 

[Harvest Fields]

Think the APS is two wire but I could be wrong. I have been before😛😛

 

[Michael29068]

Think the APS is two wire but I could be wrong. I have been before😛😛

Aps is 3 wire

 

[Michael29068]

Aps is 3 wire

I have got this boiler firing. The 2 "new"PCBs which I had purchased were both faulty. I got my hands on a used working PCB and fitted this and the boiler fired up. Thanks to all who responded to this tread.

 

[Michael29068]

Aps is 3 wire

I have got this boiler firing. The 2 "new" PCBs which I had purchased were both faulty. I got my hands on a PCB which I knew was working, fitted this and the boiler fired up. Thanks to all who contributed to this thread.

 

[RoryD]

I seem to remember the white sparking lead is no longer obtainable. Not sure if generic ones will work

 

[Michael29068]

I seem to remember the white sparking lead is no longer obtainable. Not sure if generic ones will work

I was able to purchase a white lead which worked.