potterton prima f40 fault

[lomofore]

i have a potterton prima f 40 boiler which fails to light . the fan starts then after a few seconds cuts out ,it does this constantly with out fireing up,
but if i lightly tap a black box covering a circuit board it fires up any ideas what this is and how much to repair approx ,
any advice appreciated.

 

[Soggy_weetabix]

Change PCB.

Prices vary on location which you have not given.

Dave

 

[lomofore]

cheers for the advice dave i`ll order a pcb.
Thanks

 

[Soggy_weetabix]

PCB most likely fault but dont rule out Pressure Switch

David

 

[petit_pablo]

The pcbs are awful for dry joints on these pottertons.

 

[ianjohn]

iam not sure but i thought there was a common fault on the pcb boards of these boilers it could be worth it phoneing potterton tech dept with the model and asking them if it is they may send a replacement

 

[gas4you]

Thats the Suprima, not the Prima.

 

[Soggy_weetabix]

The pcbs are awful for dry joints on these pottertons.

No they are not.

You are confusing your PCB's Pablo

David

 

[petit_pablo]

The pcbs are awful for dry joints on these pottertons.

No they are not.

You are confusing your PCB's Pablo

David

Im not, i carry both suprima and profile boards on my van. You can lift transformers out of profile boards without much force on some bad ones

 

[mackfly]

Hi Lomofore,

Did you ever solve it. If you did do you remeber what the solution was? I have exactly the same problem.

Thanks in advance

 

[picbits]

For reference, my Prima F50 had the same thing. It was cycling to fire but cutting out before it actually lit the burner.

It could take up to 40 attempts then would light. Some days it was better than others.

I stripped down the PCB and found 3 dried out capacitors. Total cost of repair was a couple of quid and an hours labour.

It ran perfectly for over a year with zero failled ignites until a couple of weeks ago when it was unceremoniously launched into the garden by my heating engineer as he replaced it with a new Combi.

I have the old PCB here if the part numbers match up - 407677

Obiously you would need someone qualified / competent to fit it (if its the right one for your boiler)

 

[lomofore]

hi mackfly i had a new pcb installed but the guy did say the old one had a dry joint ,hope this helps.