Hot water but no central heating Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[nicke]

Hi,
Very ignorant but keen to avoid call out bill if I can fix the problem. I have a Potterton Puma 100 which is producing hot water but no heating. I've bled the radiators but nothing. Please - can I try anything else?
Nick

[htg engineer]

not really - not without knowing abit about boilers.

Check boiler stat is turned up and the room stat is calling for heat. The pressure and pump should both be ok if the water is working.

When you put the heating on does the boiler fire up for a short time ? if yes - put your hand on the hot water draw off pipe, if this gets hot. The wax capsule is sticking and needs replacing. Get a Heating Engineer to take a look.

[nicke]

Thanks HTGE - I think you may be right - it did flare up and then stop. Then miraculously came on and we're holding our breath that it will hold until the new year - why do these things aways collapse during Christmas? And we'll book someone in then.