URGENT blockage in central heating sytem

[cervin1]

after 2 years and 7 plumber visits i'm now going to try and alleviate the problem myself!, according to said plumber visits i have a blockage between lower and upper radiators, downstairs perfect, apart from 1 needing bled ocassionally, upstairs rads have clear water but no heat, any clues to how to approach this? and would powerflushing help?
tyvm .

 

[Last Plumber]

We need more info.

What system?
Are there any motorized valves?
Boiler type?
Is there any heat/warmth at all in the upstairs rads or are they stone cold.
Is the downstairs working perfectly?
Did this bleeding of the downstairs rad occur following the upstairs ceasing to perform, or have you always bled it?
How did the magnificent 7 diagnose this blockage? by guess work or is it a factual thing?

 

[Scott_D]

Take up some flooring and follow the heat

 

[Gasmk1]

i had a problem like this once and there was a zone valve that customer didnt know about under the bathroom floor

 

[snowhead]

Have you been in the house longer than the 2 years and was it working (O.K) before then?

 

[PETE 123]

Non return valve/anti gravity maybe stuck (if one had been fitted years ago)

 

[townfanjon]

Potential nightmare this , floors / boards up and hopefully you may find a couple of blocked service valves .

 

[centralheatking]

after 2 years and 7 plumber visits i'm now going to try and alleviate the problem myself!, according to said plumber visits i have a blockage between lower and upper radiators, downstairs perfect, apart from 1 needing bled ocassionally, upstairs rads have clear water but no heat, any clues to how to approach this? and would powerflushing help?
tyvm .

You do not say what type of system you have. However in most cases I would shoot the system up with mains pressure. If its a sealed system it will be at 1.5 bar. If its open vented (with a small roof tank) then it will be at atmospheric pressure and a blast of mains will help. Let us know which and are there any zoning arrangements to go wrong. centralheatking