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Author Central heating - radiators aren't getting warm
Ian
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Registered: 28th Aug 99
Location: Liverpool
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5th Mar 09 at 00:33   View Garage View User's Profile U2U Member Reply With Quote

The boiler is running and appears to be producing heat - the hot water is fine. The pipe coming out of the side is hot but the bit that goes to the pump isn't, the pump appears to be running but it's not drawing the hot water out of the heat exchanger thing.

Boiler is a Powermax 155x.

Any advice gratefully received, I'm cold


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Andrew
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Registered: 5th May 04
Location: Skoda Octavia Estate, Ford Puma
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5th Mar 09 at 00:38   View User's Profile U2U Member Reply With Quote

What's the presure like?

I'm no plumber but told mine should be below 1.

In the past week i've had the boiler repaired due to a leak, a rad replaced and now have another rad leaking. British Gas are gonna love me when i phone back this week

[Edited on 05-03-2009 by Andrew]
Ian
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Registered: 28th Aug 99
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5th Mar 09 at 00:46   View Garage View User's Profile U2U Member Reply With Quote

Just over 1 although I have bled the radiators and reintroduced some water to get it back up to the red marker.


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Andrew
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Registered: 5th May 04
Location: Skoda Octavia Estate, Ford Puma
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5th Mar 09 at 00:54   View User's Profile U2U Member Reply With Quote

Silly question but is the heating been switched off on the boiler? Mine has two switches and dials, one for the heating and one for hot water.

Also, do you have seperate fuses? I've got two for some reason. Both switch off the boiler.
Sam
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Registered: 24th Dec 99
Location: West Midlands
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5th Mar 09 at 09:52   View User's Profile U2U Member Reply With Quote

I wish we had a decent boiler/heating system here. It all looks about 20/30 years old!

If we turn the hot water switch on only, the radiators also get hot, if we turn the central heating switch on only, the hot water is hot too.
C2RL R
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Registered: 28th Mar 02
Location: Redcliffe, QLD
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5th Mar 09 at 12:20   View User's Profile U2U Member Reply With Quote

what sort of system do you have?
Leighton
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Registered: 21st Feb 01
Location: Liverpool
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5th Mar 09 at 12:41   View Garage View User's Profile U2U Member Reply With Quote

have you checked your thermostat is up high enough, i no you like sauna temps but might be that not kicking in.
mattk
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Registered: 27th Feb 06
Location: St. Helens
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5th Mar 09 at 19:47   View User's Profile U2U Member Reply With Quote

the powermax is a combi isnt it? has this problem only started since you have bled radiators?

pressure should be between 1bar and 2 bar Ideally, any less than 0.5 and it wont fire

Sam your diverter valve is fucked


[Edited on 05-03-2009 by mattk]
bishbosh
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Registered: 25th Sep 06
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5th Mar 09 at 20:05   View User's Profile U2U Member Reply With Quote

How do you adjust the pressure?
mattk
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5th Mar 09 at 20:30   View User's Profile U2U Member Reply With Quote

there will be a flexible filling loop somewhere that links the heating and the cold water main, its normally under the boiler
Ian
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Registered: 28th Aug 99
Location: Liverpool
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5th Mar 09 at 21:17   View Garage View User's Profile U2U Member Reply With Quote

Fixed - the header tank was empty because the stop valve on the fill for it was closed!


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mattk
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Registered: 27th Feb 06
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5th Mar 09 at 22:09   View User's Profile U2U Member Reply With Quote

header tank AND a pressure guage

[Edited on 05-03-2009 by mattk]
Sam
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Registered: 24th Dec 99
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5th Mar 09 at 22:17   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by mattk
Sam your diverter valve is fucked


What does one of them look like?

I noticed on our hot water tank in the cupboard there is a chunky square blue thing with an electrical cable coming from it, which makes a fairly loud vibrating noise sometimes is that it? Or is it some sort of pump and I'm just talking crap? LOL
mattk
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Registered: 27th Feb 06
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5th Mar 09 at 22:18   View User's Profile U2U Member Reply With Quote

thats a 3 port one you can get them with only 2 connections on too

Ian
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Registered: 28th Aug 99
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6th Mar 09 at 00:34   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by mattk
header tank AND a pressure guage
Yeah, there's a pressure gauge on the mains in with a big red tank on the top of it, plus a T on the radiator circuit with a header tank near the ceiling above it.


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xa0s
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Registered: 4th Mar 08
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6th Mar 09 at 06:14   View User's Profile U2U Member Reply With Quote

I wish I understood plumbing.
Sam
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6th Mar 09 at 09:13   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by mattk
thats a 3 port one you can get them with only 2 connections on too




Yes that's the blue thing I was on about, it makes a really loud (at times) vibrating noise (I'm assuming that it's not meant to).

Are they expensive to buy/fit?
C2RL R
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Registered: 28th Mar 02
Location: Redcliffe, QLD
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6th Mar 09 at 09:47   View User's Profile U2U Member Reply With Quote

is that a solenoid valve then? if it's buzzing its probably the coil that has burnt out and isn't operating the valve any more.
mattk
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Registered: 27th Feb 06
Location: St. Helens
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6th Mar 09 at 12:19   View User's Profile U2U Member Reply With Quote

they have a motor in them and a little ball,

the flow from the heating comes up and connects to the one with AB on it (you can see the letters on the branches in the pic)

then A goes to the radiators and B goes to the hot water cylinder

if you have both hot water and heating on the ball inside stays in the middle, if you have only have one on the motor moves the little ball across to block off the pipe that isnt used, so if your heatings off but your hot water is on the ball moves across and blocks A, so the water from AB can go through the valve and into the coil in the hot water cylinder. and vice versa

[Edited on 06-03-2009 by mattk]
mattk
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Registered: 27th Feb 06
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6th Mar 09 at 12:26   View User's Profile U2U Member Reply With Quote

Ian does this look like the big red tank you speak of?

mattk
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Registered: 27th Feb 06
Location: St. Helens
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6th Mar 09 at 12:32   View User's Profile U2U Member Reply With Quote

ohhh the powermax is one of them floor standing things isnt it? about 4ft tall?

if its the one im thinking of they are bloody weird, quite unique
deanmcreynolds26
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Registered: 15th Sep 03
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6th Mar 09 at 19:53   View User's Profile U2U Member Reply With Quote

powermax is a sealed system so not sure why uve got a header tank,

yeah mattk they are big mama floor standing boilers with hot water storage in them, i cant stand them tbh...

there has been a few fatalaties with them down south positive pressure with twin flue setup...

potterton have got them on reduced part list now so not many parts available for them.

they are not nice to work on, was working on one the other day
Sam
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Registered: 24th Dec 99
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9th Mar 09 at 08:53   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by mattk
they have a motor in them and a little ball,

the flow from the heating comes up and connects to the one with AB on it (you can see the letters on the branches in the pic)

then A goes to the radiators and B goes to the hot water cylinder

if you have both hot water and heating on the ball inside stays in the middle, if you have only have one on the motor moves the little ball across to block off the pipe that isnt used, so if your heatings off but your hot water is on the ball moves across and blocks A, so the water from AB can go through the valve and into the coil in the hot water cylinder. and vice versa

[Edited on 06-03-2009 by mattk]


We had a British Gas engineer come round on friday to change it as our landlord has a service agreement with them, the engineer said our whole system is about 23 years old and because it's on a reduced parts list the landlord will probably have to fork out for a whole new system as it will probably die completely soon.

I asked him "how much does a new system cost, is it like 2k or something?" to which he replied "and a bit more mate"...

When we buy our own home I'm gonna make sure the previous owner has fitted a modern heating system/boiler!
mattk
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Registered: 27th Feb 06
Location: St. Helens
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9th Mar 09 at 11:30   View User's Profile U2U Member Reply With Quote

If your getting british gas to install it your looking at 5k+

any one else fiting it you will get the same level of workmanship and ususally the same componants and pay half that

for a normal 3 bedroom house your looking at about 2,500 at least for a full new heating with a combi boiler
Ian
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Registered: 28th Aug 99
Location: Liverpool
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11th Mar 09 at 21:55   View Garage View User's Profile U2U Member Reply With Quote

Yeah that's similar to the tank.

I phoned Wimpey about it running dry which isn't good for a boiler, they said if they are to look in to it I need to appoint a professional to write a report for them.


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