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Post by cameron999 on Feb 5, 2021 21:14:28 GMT
Went to a rad the other day in a dining room. Boiler in kitchen. Approx. 10-11 rad system regular 3 bed house. It was stone cold when I arrived and the heating had been on a good while, the flow (Trv) to the rad was red hot but there was not much heat at all in the rad, it was tepid with cold spots all over and there was no heat at all on the return(Lockshield which was open)
I checked the basics of course..
- it was bled
- lockshield was open
- trv pin was not stuck down and moved freely, removed trv head
- system has already been balanced but i reduced them a bit more upstairs and got the smallest bit of heat to the top of the rad but it still was not returning at all
- common sense says it cant be the pump cause there were rads further away than this one heating OK (?)
Am I right in saying there's probably a blockage or partial blockage in the rad / rad valves? I did not have much time to investigate so bunged a bottle of x400 in (yesterday) and going on monday to flush the x400 out and see if that's done anything. I'll take the rads of as well and blast cold mains through it. Other than that can't think of what to do incase it's still crap. Don't wanna just order a new rad for no reason
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Post by rocketmanbkk on Feb 6, 2021 7:11:48 GMT
How old are the rads?
Replace if necessary id say.
Is the customer happy to pay you to come back & try to fix it? Then replace the rad if necessary? Plus fist visit & x400. The price is adding up.
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Post by endfeed on Feb 6, 2021 8:14:35 GMT
Went to a rad the other day in a dining room. Boiler in kitchen. Approx. 10-11 rad system regular 3 bed house. It was stone cold when I arrived and the heating had been on a good while, the flow (Trv) to the rad was red hot but there was not much heat at all in the rad, it was tepid with cold spots all over and there was no heat at all on the return(Lockshield which was open) I checked the basics of course.. - it was bled - lockshield was open - trv pin was not stuck down and moved freely, removed trv head - system has already been balanced but i reduced them a bit more upstairs and got the smallest bit of heat to the top of the rad but it still was not returning at all - common sense says it cant be the pump cause there were rads further away than this one heating OK (?) Am I right in saying there's probably a blockage or partial blockage in the rad / rad valves? I did not have much time to investigate so bunged a bottle of x400 in (yesterday) and going on monday to flush the x400 out and see if that's done anything. I'll take the rads of as well and blast cold mains through it. Other than that can't think of what to do incase it's still crap. Don't wanna just order a new rad for no reason try turning all other rads off and force water to that one rad. |
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Post by endfeed on Feb 6, 2021 8:35:59 GMT
If that doesn't work,try taking bleed valve out,screw a rad tail in with hose pipe attached and let the water flow through.
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Post by endfeed on Feb 6, 2021 8:38:54 GMT
If none of the above work then follow this flow chart  .  |
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Post by crowsfoot on Feb 6, 2021 9:34:38 GMT
Went to a rad the other day in a dining room. Boiler in kitchen. Approx. 10-11 rad system regular 3 bed house. It was stone cold when I arrived and the heating had been on a good while, the flow (Trv) to the rad was red hot but there was not much heat at all in the rad, it was tepid with cold spots all over and there was no heat at all on the return(Lockshield which was open) I checked the basics of course.. - it was bled - lockshield was open - trv pin was not stuck down and moved freely, removed trv head - system has already been balanced but i reduced them a bit more upstairs and got the smallest bit of heat to the top of the rad but it still was not returning at all - common sense says it cant be the pump cause there were rads further away than this one heating OK (?) Am I right in saying there's probably a blockage or partial blockage in the rad / rad valves? I did not have much time to investigate so bunged a bottle of x400 in (yesterday) and going on monday to flush the x400 out and see if that's done anything. I'll take the rads of as well and blast cold mains through it. Other than that can't think of what to do incase it's still crap. Don't wanna just order a new rad for no reason You're on the Mark Cam - only thing extra that I'd do is whilst the rad is outside give it a good slosh around before emptying it. By lifting the rad up and down a few times before emptying it'll dislodge a lot more of the shit inside it. |
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Post by jcplumb on Feb 6, 2021 15:09:37 GMT
I'd say 9 times out of 10 you can sort this issue by taking rad off then opening each valve into a bucket with the pressure up to 3 bar IF this rad used to work fine. The important question is did it ever work? The customer will almost always tell you it did, customers lie. I explain to them that I can clear a blockage if there is one but it will cost a lot more if I try and fail then find the problem was bad pipework. If they tell me it's never been good I can start by finding the issue instead of trying to unblock a rad that isn't blocked. I remember reading about someone(on here I think) who went to a rad that wasn't heating up after the customer told them it used to work fine and after lifting floorboards they found that the rad wasn't even connected to the F/R pipes. I'm not saying that's the case here, you're getting limited heat to one side so it's connected up, but if the pipework is bad and you can't get it hot enough then you'll be wasting time. You're not a private hire plumber with a fixed price, you're a Hackney plumber, the meter's still going up when you're not getting anywhere |
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Post by battle1066 on Feb 6, 2021 15:39:07 GMT
A bit more system information would be handy to offer advice eg combi or system boiler, system type, age of install, filter or not etc.
I would follow steps the others have advised on.
Extra to that I would consider:-
If I was working for an employer I would compare a sample of the systems water compared to a sample of tap water so I would have suitable containers to allow such a comparison and retention - why cause different types of contamination requires different treatment methods some even require the service of a chemists report.
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Post by cameron999 on Feb 6, 2021 16:04:18 GMT
I'd say 9 times out of 10 you can sort this issue by taking rad off then opening each valve into a bucket with the pressure up to 3 bar IF this rad used to work fine. The important question is did it ever work? The customer will almost always tell you it did, customers lie. I explain to them that I can clear a blockage if there is one but it will cost a lot more if I try and fail then find the problem was bad pipework. If they tell me it's never been good I can start by finding the issue instead of trying to unblock a rad that isn't blocked. I remember reading about someone(on here I think) who went to a rad that wasn't heating up after the customer told them it used to work fine and after lifting floorboards they found that the rad wasn't even connected to the F/R pipes. I'm not saying that's the case here, you're getting limited heat to one side so it's connected up, but if the pipework is bad and you can't get it hot enough then you'll be wasting time. You're not a private hire plumber with a fixed price, you're a Hackney plumber, the meter's still going up when you're not getting anywhere Yeah i'm going to attatch a filling loop to the rad valves and blast it through just to see what the quality of the water is like before I decide to do a flush or not. I don't think she's lying as it's a nice old woman but there's always a chance |
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Post by cameron999 on Feb 6, 2021 16:57:05 GMT
How old are the rads? Replace if necessary id say. Is the customer happy to pay you to come back & try to fix it? Then replace the rad if necessary? Plus fist visit & x400. The price is adding up. I work for a social housing firm, so it isnt costing the customer anything, by customer I mean tenant of the property. I added the x400 during my first visit don't think I made that clear enough. Not meant to change rads unless they have pinholed, but if one was blocked beyond all repair the I would probably lie and say it was pinholed |
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Post by dickpuller on Feb 7, 2021 7:20:01 GMT
A bit obvious that the TRV IS jammed closed or there’s shit stuck in the TRV. Shut the LS valve.
Flow Test the TRV; get a tray under the valve union on the radiator side, crack the nut & see how muck water comes out.
If it’s a trickle & after a while stops, then it’s deffo a blocked TRV👍👍
Thank me later son, perhaps with a BJ, my regular Rent Boy is on holiday👍👍
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Post by cluelesskarl on Feb 7, 2021 17:49:41 GMT
He'll be back soon Dick! He is at Holyrude, learning the art of fluffing. (Part of the karma sutra fuck ye Scotland! trilogy). Though he will hate freedom, the right personal pronoun must be used! "Gag on that, you dirty little haggis" is no longer a term of endearment!
On the + side, you will be pleasured, while you are perving over krankies "Mein million shades of red Kampf"! 
As for the rads, I'd try the simplest first, then each step in turn. However, I have absolutely no fucking idea about plumbing!!  |
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