Is the hot one on the intake side ?
Vertical radiator loosing heat
- Thread starter creative101
- Start date
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Yes. Flow side gets hot.
I would take the rad off and replace with a section of pipe and run to see if all ok. While the rad off turn upside down and squirt a little fairy in the intake side then run the hose on it but not too high to see if clean. I know it been cleaned etc but one thing is it's like any loose sludge left in the system is building up in a bottle neck in this rad. I'd try the system without this rad in to see if ok.
will try this. But why would the rad get fully hot for about a week OR if I air out some water OR if I turn off the other rads.
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Trying to tick off the issues from a list of problems it maybe.
Hot for week... As the water going thru while hot the sludge starts to build up.
Air out... You stirring the rad and loosing any sludge.
Rads off... The pressure greater to the loft rad as less force needed to pump round the water in a smaller circuit.
If you can try piping the out pipe from where the bleed valve is instead.
What make Rad is it ?
Hot for week... As the water going thru while hot the sludge starts to build up.
Air out... You stirring the rad and loosing any sludge.
Rads off... The pressure greater to the loft rad as less force needed to pump round the water in a smaller circuit.
If you can try piping the out pipe from where the bleed valve is instead.
What make Rad is it ?
got it. What will this prove?
Creates a diffrent flow for the rad.
Silly question but is the rad fitted the right way up. It maybe an internal baffle issue . Have another look at the instructions for the fitting and check that was done correctly.
Silly question but is the rad fitted the right way up. It maybe an internal baffle issue . Have another look at the instructions for the fitting and check that was done correctly.
this was checked when the rad got installed. The baffle is fitted just past the first panel at the bottom.
Rad is right way up.
intake and return right way round.
Baffle in correct place.
Pump speeds altered and still same issue.
Balancing done.
Flushed.
Strange one this. Was it a new fix or replacement rad. Does the pipe work come upto the rad correctly.
intake and return right way round.
Baffle in correct place.
Pump speeds altered and still same issue.
Balancing done.
Flushed.
Strange one this. Was it a new fix or replacement rad. Does the pipe work come upto the rad correctly.
It was a new fix
I would imagine / hope so
particularly as it gets hot for about a week.
This will prove if its the rad or system/pipework that is the problem.
Verticals can be problematic... Even the good ones. Any issues with flow and they are the first to fail usually, especially when highest point in the system... Even normal rads in lofts can have problems, with air and flow.
The fancier the vertical, the less functional IME. Born out of the minds of designers and never seen by an engineer (until it is being fitted!).
I had to fit a very expensive (£2100) stainless steel vertical, couple weeks ago, the machining on the tappings was dreadful... Razor sharp chunk of burr left still attached inside, where drill didn't clear the holes, fancy valves with grating threads... Yuck.
Pointed it all out to customer before fitting, his response was that it was very expensive and had great reviews!
Luckily it works (so far).
Woke up this morning and the rad was stone cold... when someone turned on the tap downstairs, you could hear a loud gushing water sound in the rad.... not sure if it’s because the central heating switches to hot water and the noise is because of small pockets are air trap around the rad which makes the gushing sound.
Bled the radiator of some water and it heated up ok.
Bled the radiator of some water and it heated up ok.
Last edited:
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