Central heating problem

diycooper · 5 Jul 2007

I have got a combi boiler it is only a year old. I can get hot water but cant get my radiators to work. What could this be i assume it cant be a serious problem with boiler if i am still getting hot water

gas4you · 5 Jul 2007

Have you turned your room stat up?

micky p · 5 Jul 2007

what make and model of boiler is it.

diycooper · 8 Jul 2007

yes room stat is up.
It is a Idea HE24 combi boiler

Dan Robinson · 8 Jul 2007

Does the boiler acknowledge a call for heat (display changing to "C")?

gas4you · 8 Jul 2007

With an Ideal Isar HE24 all problems will be serious

Are you getting the 'C' symbol coming up on the display when rads should be on?

If not you need to check that you are getting 230V on the switched live on the terminal block under the boiler. Pull the black connector out an take the top off to test with a multimeter. Could be an external fault.

Do this only if you are comfortable working with 230V mains

diycooper · 8 Jul 2007

Yes. When i turn the radiators on the boiler is displaying a C on it.

gas4you · 8 Jul 2007

Does the boiler fire up but rads not get hot, or just shows 'C' and nothing happens?

corgiman · 8 Jul 2007

Stuck diverter valve, happens when the system isnt cleaned properly

not a big job to change and if its only a year old it should be a warrantee call

Dan Robinson · 8 Jul 2007

Be gratful you probably have the Honeywell diverter block. We had to change the whole manifold 'cos Ideal would not supply just the internal part of the CP valve.

diycooper · 8 Jul 2007

Does it sound like it needs a part changing or is there something i can try to fix it.

gas4you · 8 Jul 2007

gas4you said:
Does the boiler fire up but rads not get hot, or just shows 'C' and nothing happens?

Well according to how you answer this I wuld go for the DV or the PCB. Both are notoriously unreliable on these.

diycooper · 8 Jul 2007

How do i check these

corgiman · 8 Jul 2007

Get someone in I would say, neither of these is a job a diy'er should do

diycooper · 8 Jul 2007

is there anyway to check them to see if it is them. Then get somebody in if neccesary ?
Could it still be them if i have hot water?

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Central heating problem

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