Cold Radiators

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Cold Radiators

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lucolivia

Hi
I hope you can help! We had a Vaillant EcoTec plus 630 installed just over two years ago. We've recently extended the house and added 5 new radiators, some small and some larger and the total is now 15 radiators. There are two that refuse to warm up and most of the others are warmer at the top than the bottom. Our plumber has apparently balanced the system but he's running out of ideas!
Can you help please?
Thanks ;)
 
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You need to give the guy a chance to sort it himself. But def sounds like it's piped incorrectly. If he refuses then you have grounds to inform him that you will get somebody else in to sort the issue and use the outstanding funds to pay for the works. Also that if the works cost more than the what's left he'll have to pay.
 
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What about the valve on the other side ? It does not matter how bad the system is paiped , rads WILL get hot if all the others are turned off !!!
You need to check the other valve an also let air out + I am sure you have not turn all the others off , pls double check all rads are cold + please check boiler thermostat that is set at min 65 ! If not sure pls stop playing with it and get a plumber in to sort it should be easy to fault find it
 
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My response was "I think" because the plumber said that the lockshield valve was open. All other rads are cold..We've checked for air.Thanks for your help. I will speak to the plumber
 
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Finally the radiator is luke warm. The heating has been on for four hours and all other rads were turned off for the duration
 
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What is temperature set at boiler ? It could be problem with boiler tbh if temperature is set at 60 and rad is not getting hot or there is a blockage or the rev is faulty ! Please remove head of trv valve
 
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I said it was going to be a long night:rolleyes2: round and round and round, you need to get someone else to look at it and send the plumber from hell the bill:bandana: there's more guessing going on here than University Challenge or more like a game of tennis, if you live round the corner I would come round and sort it. Where do you live ????
 
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I plucked up the courage and spoke to the plumber this morning. I felt as though I knew a bit more to ask the right questions than I did before all everyones great advice on this forum. He is sticking to his guns and telling me that the boiler is under powered. He said that you lose 20% and that the approx output of the 15 radiators is 100btu (?!!) I'm not sure how I could work out the demand from the radiators...
There is some 22mm pipe upstairs but then it goes down to 15mm downstairs. He says that it's not standard practise to use 22mm everywhere and that he would even struggle to get the connections.. He also mentioned that he could fit a pump and that might help. He's also saying that he won't be responsible for an underpowered boiler as that was fitted by someone ele but at no stage did he say that the boiler is underpowered until now...
Thanks very much and any further help would be appreciated... Tony is hoping to come next week
 
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