Air lock in heating

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hi there
i have the problem with my heating system upstair rad are heating up but not the downstairs. pump is working don't know how to get rid of the air lock.
thanks
 
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Try turning off the upstairs rads to force the heating downstairs.
 
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hi nev
thanks for the sugg i did tried all that but still nothing happening an other idea please its gravity fit system
 
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is it a one pipe system too? you could trying draining and filling the system at the same time too see if it pulls through
 
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thans it is two pipe system. i did try the system fill up twice i spoke to my teacher and he said my be some blockage in the g/f pipe work. and tried to push the water from the drain valve. so i am going to try this on weekend and will post the result......... cheers
 
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thans it is two pipe system. i did try the system fill up twice i spoke to my teacher and he said my be some blockage in the g/f pipe work. and tried to push the water from the drain valve. so i am going to try this on weekend and will post the result......... cheers

Teacher?

Attach a hose pipe to a drain off and pump mains water through until it exits via the header tank..

If no drain point turn off a rad both ends, bleed it of air and water from a rad using bleed vent, remove bleed vent, replace with an iso valve + PTFE with a bit of copper pipe sticking out, attach hose to copper pipe and blast through this way (turn ra back on first). Always best with two of you - one to switch tap on and off and other to ensure hose stays in place.
 
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The pump is probably dodgy and if you have cleared the airlock the non return valve may need to be replaced
 
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Check the heating system, if any blockages in the inlet pipe, so the possibilities of air lock. Just open the faucet nearer to the water heating , so that the air will come out with that faucet, and the flow of water will be fine. Check the pipe lines for any blockages.
 
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thanks guys i will try all this and will let you know what is the out come cheers
 

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