Central Heating - Cold Radiators

[clarky254]

I recently had to turn off my hot water supply to my bathroom to fix a leak but when i turned it back on i was not getting a heat from my radiators. I have tried bleeding them but no joy.

Does anyone have any tips?

[GypsyGSD]

im no expert but i would say a air lock get your water realy hot then bleed radiators again this has worked for me when ive drained the system,as my other half is always moving radiators or doing pipe work and we did it when we had a major leak recently

[pilotlight]

clarky, Answers to the following would be helpful in trying to sort out your problem.

1. Exactly how did you turn off your hot water supply to the bathroom? 2. Does your boiler still provide hot water ? 3. What type of boiler do you have ? i.e. combi, or conventional ( heating a domestic cylinder ).

[Hard@it]

did you ensure your pump was turned off when you repaired the leak, if you didn't it may be stuck, also does your boiler only run for very short periods ?

[clarky254]

I turned the water off at the Hot water tank, i am still getting plenty of hot water but I am now getting the upstairs radiators warm but the downstairs ones stone cold. My boiler is a normal one I think i know it not a combi boiler.

My boiler is on a timer switch the most its ever on is a couple of hours and thats it.

[pilotlight]

clarky, Following your last input, It appears that your pump has failed, either by coincidence, or because of any slight movement to the pipework. If you know where your pump is sited, turn off the power to your boiler, remove the large screw slotted cap on top of the pump, ( there will be a small amount of water released when you do this, so place an old towel under the pump ). You will then be able to check if the pump is seized by trying to spin the impellor ( spindle type thing ) by using a smaller size screwdriver.

If the impellor is now free, replace cap, turn power back on. If impellor does not move, the pump will need to be replaced.

Hope this helps.

[clarky254]

Pilotlight- I am getting heat from the upstairs radiators, although its not the normal amount of heat there is some coming out of it. Would this still mean a pump problem?

[pilotlight]

Clarky, 99 per cent certain. The upstairs radiators are waming up purely because of thermal transfer. ( hot water will rise whether pumped or not ).

As I stated earlier, it may not be necessary to change the pump. Try freeing it first. If you do not feel confident with this, you will require a heating engineer / plumber.

Cheers.