2 upstairs radiators need bleeding everyday

[Jonathan Reid]

Open vented system
2 upstairs radiators need bleeding everyday
First tried turning pump speed down from 3 to 1, but problem persists.
Any suggestions would be appreciated.

 

[Rob Foster]

When you bleed the system what colour is the water, especially the water from the good rads not the naughty ones.
This might indicate wether you have a leak. Is the f & e tank topping itself up ? tie ball up and see if water level drops over a day, few days or week plus. Presume no signs of a water leak . let us know others might have an alternative idea but this will clear some stuff out of the way. Rob Foster aka centralheatking and have you bunged any inhibitor in ...if so which

 

[king of pipes]

Post a picture of your pump cold feed and vent pipework usually this would be in the airing cupboard, your cold feed could be blocked ? is there water in the feed and expansion tank is it dirty in there maybe best to have a service call from a GSI to find the problem. Kop

 

[Jonathan Reid]

Many thanks for respective replies.
Water from good radiators is clear and there is no evidence of leaks anywhere.

There is water in the f&e tank but it is quite dirty and probably needs a good clean.

View attachment 20190113_081416.jpg

 

[Rob Foster]

ok, brown water would have inducated fresh water being fed into system regular. you have a filter ok. now tie up the ball valve on f & e tank ...the little one not the big one and see if the water level goes down...use a stick and mark it..check in a day, few days and week . and see whom else has ideas as they wake up. Rob Foster aka centralheatking

 

[king of pipes]

Can you tell me where the circled pipe goes please you have had some work done on the system is this a problem since then ? What does the lever valve isolate . Kop

 

[Jonathan Reid]

The circled pipes goes into the loft and have traced it going in to the base of the f&e tank. The isolation valve is for shower that was installed 3 years ago.
The problem with the air locking only started recently.

 

[Jonathan Reid]

Hi Rob, with regards to the movement of water in the f&e tank, if it was free of gunge and blockages would the water level rise when the heating is on and fall when the heating is off, or the other way round?

 

[king of pipes]

If the cold feed is on the live side of the pump then that's your problem . Kop

 

[Jonathan Reid]

Hi Kop, its an interesting theory and one which I will pursue further. It looks like the piping has always been configured that way. Does this mean the pump (fitted 2 years ago) is the wrong way round? Why would only 2 radiators be affected?