I'm trying to figure out our heating system and it has me totally stumped! Our house just doesn't get warm enough and there are a few issues. House is 1960s, cavity wall insulation, double glazed, loft insulation etc. The upstairs stays pretty warm but it's the downstairs that has a problem. Downstairs is all open plan so a bit of a bugger to heat but the heating system doesn't seem to be helping. It's our first winter in here.
I'm an avid follower groupie of pigletjohn, so I'll list what we've got and what I've tried. This may be an essay but better to have as much info as possible!
Boiler is a Vaillant EcoTech Combi fitted in 2004, plumber who serviced it on moving in (British Gas- was a freebie service) said it was big enough for the property, and he repressurised the pressure release valve with a bicycle pump as the boiler was leaking. Pressure has been pretty stable since then, no leaks on PRV. I periodically bleed rads and repressurise but there is not too much air (normally just one rad but which one seems to change ). The air does have a chemical smell when it comes out and the water is clear. Can't see any leaks but a lot of the pipework is under wooden floors. No damp in the house and no problems with humidity levels so I'm guessing no big leaks anywhere.
The BG engineer noted the boiler was a bit sludged up so we had a magnaclean fitted in October by a local plumber (recommended locally and by a friend). I cleaned this today and it had only picked up a little dirt. When fitting it, he said it looked as though the boiler had not been properly serviced and parts that should have been replaced had not been done (can't remember what he said- seals? He said he would put a sticker on the boiler to show it had been done, and should be done at 5 year service). He said it could already be a bit damaged from dirt build up and might not work much longer- do I take this with a pinch of salt? We also couldn't locate the drain valve for the system anywhere, but I might have found it at the back of a cupboard in the playroom (ex garage).
TRVs are fitted on most rads apart from the bathroom ones. I unscrewed them, gently oiled and loosened the pins (they were moving but a bit stiff), then screwed them back on. They are Optima TRVs. All rads seem to have been fitted in 2004 too as they are certainly not 1960s radiators. Whole house was renovated at that point.
We had a Cosy smart thermostat fitted- this certainly switches the heating on and off at the right time but the boiler sometimes seems to stop working when the thermostat is showing the house is not up to temp. This evening the boiler was off and showing water temp of 50c, despite the thermostat being set for 22c and only showing 18c. The max water temp for the heating is set as 75c on the boiler. So the boiler is cutting out before it should.
The big radiator in the living room never seems to get properly warm- it is mainly cool at the bottom and I noticed that the pipe leading to the rad, the other side from the TRV, is lukewarm when that pipe is hot on other rads. So I'm wondering if it doesn't heat properly rather than cool due to sludge?
Yesterday the boiler was doing some major banging- it sounded like someone was hitting it with a hammer it was so loud! I turned the heating temp down from Max and that seemed to help and bleeding the rads seems to have helped a bit as I've turned it up again. Though there wasn't that much air.
Anyway, based on my essay (and if you haven't fallen asleep) what should I do? Do I need to replace TRVs? Just the heads or the whole valves? Do I need a powerflush? Is there a major problem with the boiler or will a few bitsbeing replaced help it? Or is there no point flogging a dead horse and I should just get a new one? I know we need to get a plumber in at one point, but hopefully if I sound like I know what I'm talking about I'll be less likely to get ripped off!
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Heating woes
15 replies
EarSlaps · 16/02/2016 21:00
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