Cold radiators upstairs (hot downstairs) and little hot water

[lairdostevo]

Hi.

I've an oil-fired condensing boiler (11 years old) in the garage which has two external pumps (Wilo RS50s). I decided to flush out the system and after emptying it via the lower ground floor radiator added Fernox F5 to the tank and turned the supply back on. Running the system leads to the downstairs radiators heating as normal but the upstairs ones hardly at all (3 out of 9 get a little heat at the bottom but the others remain stone cold). I managed to get a little air out of some of the upstairs rads (the ones that get a little heat) but none out of the others. About to have a shower this morning I also realised that despite the system being on for 5 hours last night and another hour this morning there was only a little warm water in the top of the cylinder.

I'm wondering if one or both the pumps are on the way out but I'm no expert which I why I'm here!

Thanks in advance for your help.

Steve

 

[SimonG]

Air locked. Boil it out if it persists.

 

[SJB060685]

Open vented system? If so sure the system is completely filled ie ballvalve in header tank not stuck.

 

[lairdostevo]

Air locked. Boil it out if it persists.

Thanks Simon. We noticed this afternoon that the boiler (Warmflow) is leaking and so had to call a plumber who's now told me that I need a new one - he tells me that my flushing of the system simply brought that forward a little.

 

[SimonG]

Thanks Simon. We noticed this afternoon that the boiler (Warmflow) is leaking and so had to call a plumber who's now told me that I need a new one - he tells me that my flushing of the system simply brought that forward a little.

You got any pictures of where its leaking from?

 

[SJB060685]

Where did he say it was leaking from?