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Discuss Power flushes / rads not heating up - HELP PLEASE! in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Hiya
We recently moved into a 25 year old house and all the rads were working except for the kitchen one which was stone cold as was the pipework leading to it.
We got a plumber in who fixed it but then our bathroom upstairs and small bedroom rads didn’t heat up. The plumber returned put some cleaning stuff through the system. After a few hours the rads upstairs were getting hot (all the ones downstairs were turned off at this point) and when we turned them back on, the rads appeared to be working.
We then had the heating off for a day or so and now it’s back on our living room and downstairs hallway rads, although get slightly warm, are not hot like they were before.
We’ve been told we may need a power flush but they seem expensive so we really don’t know what to do.
We dont mind paying it if the power flush will definitely work but I’ve read stories on the internet saying they are around £4-500 and a waste of money as they are not very successful?
Help! Does anyone have any advice or experience of this please?
It’s been non stop paying out with issues in our house since we moved here so it’s getting a little frustrating now.
Many thanks in advance.
Mandy from Hertfordshire
 
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Do you know what sort of boiler and system you have, if not see if you can upload a picture of the boiler and a radiator or two with the surrounding pipework. It is either an issue with a failing pump or a dirty system or possibly both, the former is easy to check.
 
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I think we all sympathise when you move into a place and you have a list of things as long as your arm that need sorting. Unfortunately it does sound a little like your system might well be mucky. As per post above pics of boiler and set up as well as an idea of pipe sizes leading to radiators would also help
 
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We have a heat only boiler. I think I’ve posted some photos for you to see?

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How big is your system? Rads upstairs/downstairs???
 
also any chance of pics of the pipe set up in the airing cupboard
 
Ok so fairly small system I’d say potentially not a balancing problem. By turning off all the other rads except the not working ones can you get them to heat up
 
Could you take one just stood back with the door open
 
Agree with above, perhaps turn off all upstairs and see if downstairs heat up and then vica verca then continue to open one at a time and see if they can all heat up if not all simultaneously. Although debris can shift you're tying to establish whether it's the pump, crud in the system or both.
 
We’re just trying to make sure 2 rads upstairs are off because one of them was on even though the TRV was in the off position.
The other one in the bathroom does not have a TRV
 
That's ok the bath rad doesn't usually have a TRV, are any of the pipes leading up to the bath rad hot? Do any of the radiators need bleeding?
 
Is anyone competent enough there to crack open one of the radiator valves and see if the water is mucky
 
Could be a combination of dirty system and weak pump
 
The plumber that came here said that the water in the heating system is very clean so no need to flush the system...but that was when he fixed the non working kitchen rad and before we had the problem with the two upstairs rads and now just the downstairs 2 rads
 
Find another plumber, make sure he tests the pump and all the TRV's before deciding to go ahead with a powerflush. A heavy duty cleaner (if that is the issue) should be able to get your system going without the need for a powerflush in my opinion.
 
i would change the pump as its lasted well, i would say its the same pump as when they put the system in
 
Small bore pipework will block very much easier than 15mm pipe. Clearing it is so difficult. A heavy dose of cleanser is required and also a Magenetic Filter to collect the deposits as they are loosened. Clearly a flush is needed. That damned microbore again!!
 

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