Whats wrong with my heating?? :-(

JACKHANDYMAN

Hi, You do not say in your post which radiators are not getting hot ie have you an extension to the house for which these are fitted? It would be an idea to give us the location to help try and identify the cause! This would include how many radiators you have and the make and model of you boiler

mrsvanderkamp_2

JACKHANDYMAN wrote: »

Hi, You do not say in your post which radiators are not getting hot ie have you an extension to the house for which these are fitted? It would be an idea to give us the location to help try and identify the cause! This would include how many radiators you have and the make and model of you boiler

Hi, I think all this info is in the earlier posts. but the rads that don't work are the living room and hall way and they share a pipe as indicated in my last post. This is not an extension or new pipes or anything. The boiler is a Viessmann Vitodens 100 combi boiler. Thanks

plumb1_2

mrsvanderkamp wrote: »

Thank you.

I wonder if anyone could answer these specific questions as it might help me a little as I have plumber blaming british gas and vice versa

1. British Gas have replaced a pipe in the boiler and are coming tomorrow to replace another piece. I saw the pipe he took out and it was full of black rubbish - he says that if the flush was done properly that wouldn't have been there - is that true? I was here for part of the flush and I know he was here all day, I don't THINK i've been fleeced by a cowboy but the problem is you never really know do you?

There really shouldn't be any sludge in the boiler, after a powerflush. I always try to isolate the boiler when flushing, then do the boiler seperatly and use magnaclense twin filters to avoid sludge entering the boiler

mrsvanderkamp wrote: »

2. After the flush the rads all worked and the house was much warmer than before which also makes me think it was done correctly, so would the offending rads just stop working?

Sludge may have entered the Heat x, do you hav a filter fitted ???

mrsvanderkamp wrote: »

3. British gas say that the valves on the rads are fine - they say they have adequate "flow" even though they are pretty old and two rads dont even have a thermostatic valve - any thoughts?

Should not matter if they dont have trv's

mrsvanderkamp wrote: »

4. The plumber blames BG for the state of my boiler - there were a couple of old leaks and he says they could be the problem, could they? British Gas say not and to be honest on the basis that the hot water and the rads that do work are lovely and hot, I'd be surprised if there were really any problems with the boiler itself - again any thoughts?

If some of the rads work, then its not a boiler issue

mrsvanderkamp wrote: »

5. The 2 main problem rads share a pipe (one either side of the wall in the lounge/hall) and the pipe seems to be hot up to that point - could there be a blockage at that point?

Sounds like there still could be a blockage??? I would turn off all the rads, then take the air vent out of one of the problem rads, hold a bucket/jug under the vent and open the flow and full the water through until it got hot, then close the valve and then do the same with the return ( boiler off).

TIA

mrsvanderkamp_2

Thanks Plumb1 - what is the air vent? Do you mean bleed the radiators? and when you say boiler off do you just mean turning it off at the switch? in which case if the boiler is off how will I know if hot water is going to come into the radiator?

mrsvanderkamp_2

plumb1 wrote: »

if its had a proper powerflush then it should have removed any sludge or blockage, as the plumber should be able to spot this when flushing.

If your system has been converted from a normal system to a combi ( as you say in another post). I would be looking at the pipework under the floor etc. I have had this problem before after flushing, a old bypass valve not taken out when swopped to a combi, the flow will take the easy route back to the boiler, and not allow some rads to heat. get the plumber to check the pipe routes.

it hasn't been converted to a combi we've always had a combi boiler, but that does sound like what is happening however..

southcoastrgi

plumber or BG get them to run the heating & check the temp of the connection to the plate hex, also make sure the pump is set to stage 2