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Plumbing

No heat in donwstairs rads.

Anonymous user 15/03/2024 - 2.45 PM

I have 4 radiators upstairs and 2 down. The 4 upstairs all heat perfectly well when the central heating is on. The 2 downstairs get no heat at all and even the pipes (microbore 10mm) leading into the radiators are stone cold. The boiler is only 18 month old and even before it was installed the radiators in question did not work properly so I cant see it being a problem with that. I have also recently had a power flush which did not make the slightest bit of difference and a plumber has had the floorboards up in the bathroom (boiler is directly below here), he could not find any problem with the pipework. I have balanced and re-balanced the radiators with a little bit of success before and I would say once every 20 times of the central heating turning on the radiators will fully heat up and then the next time they won't which is strange and I can't think why they would do that. Any suggestions please, I'm at my wits end with them, possible relaying of pipework? Edit: plumber did not take the rads off before the flush. The power flush lasted around 6-7 hours and there is a magnetic filter installed.

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3 Answers

D & R Property and Plumbing Maintenance

Rating: 4.9 out of 5

New Romney

you really should have had it power flushed before boiler was installed,power flushed after installation just flushes debris into boiler ,did they fit a filter in return when boiler was installed ?,how long was power flush ?,did they take off problem rads and flush them through,microbore pipework unclipped under floor rises and falls between joists ,this sounds like muck in the system just floating around and getting caught in microbore pipework,take off downstairs rads flush them through,place microbore pipes in bucket open valves and flush through pipes untill they run clear,other than that as problem already existed it may be bad pipework design or installation.turn rad valves off,take bottom rads off,place valves over a bucket and flush through,take rads outside and flush through,if all clear you will know pipes and rads are clear,is this a combi boiler?.

Answered18 January 2019

Anonymous user

Agree with D & R, all boiler swaps should be power flushed and a filter fitted, if you read the small print of the your warranty it will say along the line that your warranty is invalid if it’s due to sludge/ dirt in the system. If the rads are that old downstairs maybe just replace for new ones and have a filter fitted. Sludge build up in a system tends to be in the bottom rads If you have microbore pipe (narrow pipes) that could be the cause If you did all this it is also not uncommon to find the pipes are so badly congested that section need cutting out, but that is only on extreme cases. Timescales Powerflush can take a whole day depending on number of radiators To change individual radiators that you know are problematic can tak around 2 hours per rad Get a filter fitted regardless and minimize damage to the boiler Regards Boiler’s and bathrooms London

Answered18 January 2019

PDunn

Rating: 5 out of 5

Holloway, London

As above.... Have system checked and balanced...may help may not These measures should be in place.. Or just stuck valve glands. Hope this helps pd

Answered29 January 2019