Potterton performa 30he

[flesi]

I'm loving these potterton/baxi faults with little bit help from guys in this forum. Working on potterton performa 30 he, ignition lockout. It does spark, inlet pressure ok, 4.1koms on gas valve, I'm thinking is the igniter plug on gas valve??? Any suggestion?? Cheers

 

[diamondgas]

Does the gas valve open? What BP you getting out of the valve? Power to the valve from the board? If you know you've got power to the valve the I'd suspect lead or valve ... They have two coils on the gas valve I believe middle pin is usually the earth and the two pairs either side are the separate coils

 

[flesi]

Cheers for the reply, gas valve doesn't open , obviously zero BP, 240 v between 2 & 4 on A1 on PCB as per manual instruction , so power going to the valve. Changed the leads. It's must the valve

 

[diamondgas]

Yep! sounds like gas valve... As said check both coils to see if any are OL also check out the earth at the condensate trap .. pull it off and see if it makes a difference ... It won't come to mind what that dodgy earth does .. I think you still get ignition?

 

[Billy Bob Bob]

Yep! sounds like gas valve... As said check both coils to see if any are OL also check out the earth at the condensate trap .. pull it off and see if it makes a difference ... It won't come to mind what that dodgy earth does .. I think you still get ignition?

or governor failed

 

[flesi]

Dodgy earth??? I did pull the lead of the condensing trap but it made no difference not the earth thou. I should try that first .

 

[diamondgas]

Dodgy earth??? I did pull the lead of the condensing trap but it made no difference not the earth thou. I should try that first .

I'm nearly sure it messes with the flame rectification and tells the board that it can't detect a flame. It's attached to the condensate trap so that if the condensate becomes blocked water will rise up causing a connection to earth! I'm nearly sure you still get ignition!

 

[flesi]

In the end had to change the gas valve.