I've had a full bathroom instal done however I now have no central heating.....Firstly the overflow valve at the outside of the house was open so when the water was turned on in my tank in the loft it went straight through the full system and all ran out. Subsequently I had air in every single radiator - all radiators have now been bled but my pump is making a straining noise. I have tried to bleed this (while switched on and off) I hear no air being released and there is also no excess water coming out of my pump. When switched on the pump now sounds better but I still have no heating ....There is one radiator I have not bled as the valve is stuck but I don't believe this would affect the whole system....I am unsure what to do now - any help would be greatful.
How to bleed a central heating pump.....
- Thread starter markyd1977
- Start date
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Make sure the wall thermostat is turned up, you may have overlooked that simple one!
I didn't mean you being the 'simple one' 
Yip, done it, I can hear as if the heating is on but still no joy.
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The boiler has not 'tripped' off when lack of water passing thro' boiler.
The three way valve may have got stuck, make sure it is switching from hot water to central heating.
Thanks for getting back to me so quickly ........ however I don't know what the 3 way valve is or what it looks likes or how to switch it.
Sorry - I assuming loads of things. When reading your first post it looked like you had bled the pump via the large silver screw, perhaps that was not the case. Have you, and have you checked the pump was spinning, look at the FAQ's to check how to bleed the system.
I thought I was bleeding the pump but nothing was coming out (air or dirty water) I tried to look inside the pump and it looks like it's spinning but it's roasting hot...............time for a plumber me thinks !!!
Piece meal I'm afraid, but it all just sounds like an annoying air lock.
In desperation try switching from hot water only to central heating only with pump at highest speed setting a few times.
In desperation try switching from hot water only to central heating only with pump at highest speed setting a few times.
I'm not sure what you mean by this..............The pump is in my airing cupboard upstairs..there is not hot pipes at all near the pump so I don't think it's pumping at all....
Help me - anybody else, is this a gravity fed hot water cylinder and a pumped central heating circuit. With no water in the central heating pipework, caused by simple airlock.
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