It does sound as if the boiler may need to be de-rated & then see how it reacts. I have had the same thing on a Vaillant 428 which displayed the same symptoms although it had been working fine for 2 years.
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Richie_77
Tell him ether come back and sort it out though the leak in the existing system really isn't his fault or your sue.
Simple
Simple
why wont he fit the filter? its designed to remove sludge so its pointless fitting it after dirty water has been circulated around the system/boiler and then cleaned out. It would give you the best indication that the flush has worked if it was fitted and it was clean when checked.
was it a power flush? ie. used a big pump/machine, flushed each rad on its own, took most of a day?
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happyflyer
It beats me why anyone would want to buy anything made in France, wine, cheese, cars and least of all boilers, have you even wondered what they buy from us, Worcester Bosch, me thinks not:54:
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happyflyer
Kitcat where do you live, surely someone on the site must be near you, it might be something simple, not sure about over size boiler most new boilers have a hell of a turn down ratio, is the system pumping over, you need someone to take a fresh look at it all this guesswork will send you into a spiral dive.
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kitkat
Hi Thanks again. Firstly he did use a machine to flush, it took less than 3 hours including setting up & clearing away. He only did one rad downstairs & had water draining outside. He was supposed to have done this when the new boiler was fitted but my husband does not remember seeing the machine ( but he is not one to take much notice eg he was at home when the work was done & didn't notice the filter was not fitted. ) On derating the boiler- Vaillant engineer looked at the number of rads & made no comment on the size so we assumed it was ok. Today the rads are like warm, hot water hot but not as hot as it used to be. Noisy pipes are much quieter but we now have noise from airing cupboard & possibly from the new pump which disturbed my sleep. Plumber can't come back till Weds, to check if there's any more dirt in the system. He thinks if there is then there is another leak, possibly under the concrete floor. Then we go on holiday for 2 weeks. I was hoping to sort it out by then but I doubt it now. At least it's not winter. Cheers
3 hours to powerflush seem's a short period of time. Its not a one pipe system is it? new rad valves fitted?
probably best to remove a rad, take it outside and flush it with a hose pipe, see what sludge comes out.
probably best to remove a rad, take it outside and flush it with a hose pipe, see what sludge comes out.
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kitkat
Hi Sorry what's a one pipe system? The rads are on a circuit, not individually fed. Pipes were fitted in the mid 80s, rads with were replaced in the last 5 years all with TRVs. Rads have been on 3 hours tonight, room stat is at 30, the thermometer is reading 20. So still not working properly. Even if |I tried to get another plumber they wouldn't get here before the other one is due, & why should I pay someone to do work the other one has already been paid for and did not do? Thanks
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kitkat
He says he wants to check the system is clean still & no other problems before he installs the filter we paid him to do last year, which he forgot to do. And he still needs to fix the problem of water & c/h not heating properly.
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Richie_77
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pipefitter
19.2 sounds high for a four bed house, even if it doesn't have cavity insulation.
Can you post the data you fed into the calculator?
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kitkat
Hi 8m, 7m, 4 external walls, 50 mm loft insulation. 10 rads & I can't remember anything else. Thanks
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kitkat
Hi Even if the water runs dirty on his next visit and there might be possibly another leek? thanks
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kitkat
Hi I am trying to upload pictures of the pipes in the airing cupboard but nothing is happening. Any idea how I can do this? I've used the insert image icon, but nothing happens when I click upload photos. I wanted to do this as he is now saying the noise I now have in the airing cupboard might improve by repiping the pipes into a more modern way of doing things. Should I trust him on this- If I can upload the photos perhaps as someone can help? Thanks Also he now again saying the heat exchanger is faulty.
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kitkat
According to the OH who was at home for the first visit, no, & neither did the Vaillant engineer.
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Mike Jackson
Probably a long shot but is the pump wired back to the boiler? A colleague of mine had problems with a Vaillant due to the pump being wired along with the switch live instead. Something to do with the electronics of the boiler not detecting the pump and lowering the output of the boiler.
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