Potterton Puma 80 problem, please help.

[cupra_matt]

Hello everyone.

I must apologise as my first post is to ask for help, but iam in desperate need of some assistance.

The CH stopped working about a month ago, so i recently got hold of a new PCB for it, about 2 days before i put it in the Hot water also stopped working.

There was no power to the thermostat and the pilot light kept going out.

So i fitted the PCB and a new thermocouple. The pilot light now remains lit, and i now have power to the thermostat. But still neither works

when i turn the thermostat up the pump starts to run and the fan is running too, but the boiler fails to light. when i turn on the Hot water the LED on the PCB comes on but yet the boiler fails to light.

I have checked the Hot water flow switch which is fine, i have measured the esistance across the gas valves which appear in spec, all the other switches appear to be ok, but i ain't no boiler engineer.

So i have just installed a new transformer, just guessing now, but its no different.

So everything seems fine but the boiler is just not lighting on either CH or Hot water.

Is there anything i may be missing?

Regards

Matt

 

[Vic Spanner]

Is the control knob on the gas valve in the flame position.

 

[cupra_matt]

Yeah it is mate.



I have been doing some reading and realised the fan should be running all the time slowly, there is no fan running. will this top the boiler firing up?

 

[Rob]

It should run all the time to get rid of pilot fumes if its not doing this then it may not create enough pressure when at full speed to activate APS.

 

[baxpoti]

Are you sure the fan is running, as per your original post?

 

[cupra_matt]

My boiler has now started working again.

Now i can here the fan running all the time.

So obviously that was the problem.

we had some high winds that may have started it again. But all is well now.