Potterton Flamingo2 Hot water

[ludi.victor]

I have a Potterton Falmingo2 bolier.
Pilot light is on okay, but when the H/W switch is switched on to contstant the burner fires up runs for about 2 minutes then shuts off. It will not fire up again for about 1 houre then it will fire up again for about 2 minutes and again then shuts off.

Turning the Thermostat knob makes no difference.

I have turned on elec immersion heater at H/W tank to get hot water.

I am thinking the Thermostat is the fault here. I have not checked any further yet.

The bolier is not making any starnge noises.

Any ideas before I start to take it apart?

Thanks

 

[ollski]

I'd check the pump first, what does it do on heating?

 

[ludi.victor]

Thanks

Would the pump be in the boiler or externally mounted?

 

[ollski]

external
although saying that something that old may be running on gravity hot water.

 

[ludi.victor]

Hi
Yes coming to think about it, the only pump I can recall is the C/H pump in the airing cupboard.

Would you think that the stat was dodgy?

Is there any way of testing the stat apart from substitution?

Thanks again for your help

 

[ChrisR]

Check for an air-bleed point by the HW cylinder. It'll be on the upper of two pipes which go into the cyl from the side.
Air >> no circulation >> hot boiler!

Let us know what you find.

 

[ludi.victor]

Hi
Had a look after work tonight

Unfortunatley no air bleed and the top fitting has been sealed.

I took the front cover off the boiler and there doesn't appear to be a bleed here either

So I can't see how the system would have been bled, except from day 1 when it was filled.