Central Heating Problem

cs1986_2

If anyone can help me then that would be great...


Basically the towel rail in the en suite started being cold at the top and hot at the bottom when the heating was on. We bled it and it was fine but then a few weeks later the same issue so we know there is a problem.

As we bled it a couple of times we didn't want to keep doing it as I know its not good for the system. All the other radiators were fine but now the coldness at the top has travelled to one of the bedrooms and affects a small standard radiator in there. So we now have a towel rail and bedroom radiator partially cold.

Not sure what I can do to fix this or what the problem might be?

We have a system boiler downstairs, the hot water tank is upstairs and we have a water storage tank in the loft which I believe provides the cold water to the two bathrooms.

The boiler is pretty old and we were considering having a combi conversion done but I am not sure if this would fix the issue either so id like to get the heating sorted before we went down that route.

Occasionally (although it hasn't happened for months whilst the heating hasn't been on) The pump which is in the cupboard with the hot water tank would continue pumping really loud when a tap upstairs was turned off. To get it to stop you had to turn the tap back on and off again. Not sure if the pump is on its way out (another reason for the combi conversion idea aswell as energy efficiency and freeing up and upstairs cupboard).

Does anyone have any ideas?

Id like to out some inhibitor into the system too but I believe you have to drain the system first? Not a clue how to do this!

Le_Kirk

When you bleed air out of the system you have to replace it with something, ideally water. Is yours a pressure or gravity system? If pressure, you need to find the filling loop and open the valve to replace the air you bled out, making sure the pressure goes to about 1 bar. If gravity fed, check for a small tank that might be empty due to the ballcock sticking.

cs1986_2

Le_Kirk wrote: »

When you bleed air out of the system you have to replace it with something, ideally water. Is yours a pressure or gravity system? If pressure, you need to find the filling loop and open the valve to replace the air you bled out, making sure the pressure goes to about 1 bar. If gravity fed, check for a small tank that might be empty due to the ballcock sticking.

I thought that my upstairs bathroom was gravity (water doesn't come out of the taps very quick and I believe there is a huge water tank in the loft).
Downstairs I thought was pressure, the cold water comes out of the kitchen tap very fast but the hot water is slower!
Im not sure to be honest which it is. I will have to try and figure that out

Le_Kirk

I was referring to your boiler as being pressure or gravity fed rather than your bathroom. Can you tell us the name and model number of the boiler?