Potterton Puma 80, no hot water or CH

[Stevoland]

Hi,

When I turn on the hot tap there's a red light on the modulator board. I followed the diagnostic flowchart which says either change the DHW flow switch or the frost thermostat. I changed both but it's still the same.

Any ideas?

Thanks!

 

[picasso]

Does your boiler have a permanent pilot light and if it does is it alight ?

 

[Stevoland]

No it's not a permanent pilot. When I open the tap, the fan goes on, a relay clicks but the pilot doesn't light then after a couple of seconds the red light comes on the board.

 

[picasso]

The red light is probably the dhw flow switch showing demand for hot water, have you checked you have enough water pressure and the gas is turned on ?

 

[Stevoland]

The water pressure has been dropping regularly over the last few months but I have been opening the tap underneath the boiler to top it up. I presume the gas is on - it certainly was when it stopped working. I'll check tonight. Thanks for your help!

 

[HootingOwl]

Can you see or hear a spark trying to light the pilot?

 

[Stevoland]

no, I can't see or hear any spark.

 

[HootingOwl]

Time to get an RGI in. You have checked the obvious.

 

[Stevoland]

Ok, thanks for your help.

 

[Agile]

No it's not a permanent pilot. When I open the tap, the fan goes on, a relay clicks but the pilot doesn't light then after a couple of seconds the red light comes on the board.

That boiler model does not have a pilot and just lights the burner directly.

At least when its working properly!

Tony