central heating problem

[ocatain]

Hi,
I removed a unused rad. and re filled the system again bled the system and turned it on. All rads worked fine except the two furthest away from boiler I got them working once with a further bleed but after two days they are cold again. Can anyone HELP
Regards
Ocatain

 

[frodo]

bleed them again

turn on make up watter, close return valve at heater, turn on supply valve and bleeder valve

leit it run water till it stops sputtereing...run it a good 5 minutes more

open return

 

[ocatain]

Frodo many thanks for your good advice.
I followed your instructions and now the two rads are partly heating, luck warm, should I repeat the process, could it be the pump ?
Thanks again,
catain

 

[ocatain]

Frodo,
On my second try I got lift off both rads are preforming well, happy days.
Again many thanks for great help
Kindest regards,
ocatain

 

[ocatain]

Hi again,
I had success for about a week with your suggestion Frodo than the small rad in the ensuite went off completely and the large rad in bed room is just Luke warm. I tried the process again a few times with no joy. Any more suggestions PLEASE.
Ocatain

 

[Matt30]

The initial air lock could of damaged the impeller in the circulator, thus not being able to move water at the rate it once did.

 

[ocatain]

Thank you Matt30,
Should I drain the whole system and start again or have you any other suggestions.
Regards ocatain

 

[chrlsbell349]

This should help http://lemarg.ca/electrical-mechanical-work/