Rogue radiator, help!!!

[Riley]

Hope someone can give me a helpful tip here.

Cust took rad rad off for painting. Just a small bathroom rad. Worked fine until this point. Newish rad.

Rad back on, valves opened, bled, no heat.

Pipework goes up on separate loop from airing cupboard across 2 metres and back down in bathroom.

I Thought air so popped the rad off again opened both valves into bucket, water bucketing out and hot, so assuming no airlock or blockage. Put radiator back on. No heat!!

as I say newish rad, I installed when I did bathroom 14 months ago. Rad comes on with DHW and CH so is it likely that it's just dirtier through greater use? Sludged and horrible???

im thinking new rad but wondered if anyone had any other thoughts

cheers

matt

 

[lambchop]

Put a hose on doc and gently drain it off while adding some water at filling loop, vent it and hopefully pull the heat though or and put some Aav at top of pipes.

 

[lambchop]

Aav on flow, manual bleed on return

 

[Riley]

Sorry mate I missed those vital points didn't I.

Open vented and and there is an AAV :smile:

 

[lambchop]

Sorry mate I meant on the elbow where pipework in loft drops down to bath rad, cut a tee in put vent there, sometimes putting hose on doc and dragging through heat can cure it.

 

[lambchop]

If sludge when u drained down rad was it mucky

 

[rocketmanbkk]

I had an issue like this, turned other rads off & non working rad full on, when it got hot I opened other rads up. It worked!

 

[lambchop]

Connect hose to mains pressure and backfill bath rad using mains pressure on its doc, this has never failed me

 

[Chalked]

When you say it's on with both hot water and heating.is it gravity hot water? Could just be bypassing the rad if it's not configured to work on gravity.

 

[Riley]

No sorry pumped but rad plumbed in prior to 2 ports

 

[jonnyswamp]

Take rad back off and check for a blockage in rad tails, probably took it off and stood it in the garden?

 

[mfgs]

Just shut off all other rads and cylinder balancing valve a bit. Any auto bypass on the system will need to be closed as well and force the circulation to the problem radiator. It will just be an airlock somewhere on the return I would have thought.