Central Heating Won't Work

[red 2 hats]

Can anybody give me some advise, got a Worcester Greenstar 24i Combi boiler, I am still getting hot water, but the central heating won't come on.
I've checked the pressure and that's fine, I've tried upping the wall thermostat to maximum, the boiler is making all the right noises but it isn't sending water to the radiators, I'm getting grief from the Mrs coz it's freezing, is it something I can fix myself or professional help only, any idea of the cost, cheers.

 

[Gray]

I don't know if you have the manual, but here is the pdf link, fault finding is at the end.

https://www.worcester-bosch.co.uk/support/document/download/release/8716115166/12640

Could be the pump not working or an air lock possibly, have any of the warning lights come on?

 

[stony]

Can anybody give me some advise, got a Worcester Greenstar 24i Combi boiler, I am still getting hot water, but the central heating won't come on.
I've checked the pressure and that's fine, I've tried upping the wall thermostat to maximum, the boiler is making all the right noises but it isn't sending water to the radiators, I'm getting grief from the Mrs coz it's freezing, is it something I can fix myself or professional help only, any idea of the cost, cheers.

Have you tried turning it off and on again? I'm being serious too. We have the same problem with ours after a summer of it not being used. The hot water works but the heating doesn't come on. I turn it off and then back on and it must reset something and it starts working again. This has happened for the past couple of years.

 

[RadcliffeRick]

Pump is stuck, sat there for 6 months not moving. Give it a few light taps with a hammer. Light being the operative word!!

 

[red 2 hats]

Pump is stuck, sat there for 6 months not moving. Give it a few light taps with a hammer. Light being the operative word!!

Hi mate, excuse my ignorance, is the pump in the boiler or elsewhere, cheers

 

[andyhinch]

Set fire to it and claim on your insurance, it's your only option

 

[Mossy1973]

If you are getting hot water then it is not the pump. The pump is situated in side the boiler by the way.
It could be a fault with the PCB but it will more than likely be the 3 way diverter valve.
This can stick if not been used also when did you last get the system serviced? i.e. flush and cleaning/inhibitor fluid added to the CH side.

 

[red 2 hats]

If you are getting hot water then it is not the pump. The pump is situated in side the boiler by the way.
It could be a fault with the PCB but it will more than likely be the 3 way diverter valve.
This can stick if not been used also when did you last get the system serviced? i.e. flush and cleaning/inhibitor fluid added to the CH side.

Hi mate, I've located the pump and gave it a gentle tap also put a screwdriver in and rotated the pump ( you tube video ) still no joy with the heating, last had it serviced 17 months ago and they put fernox in the system, monies tight at the minute, any idea how much to fix it ?

 

[Dirty Harry]

If you are getting hot water then it is not the pump. The pump is situated in side the boiler by the way.
It could be a fault with the PCB but it will more than likely be the 3 way diverter valve.
This can stick if not been used also when did you last get the system serviced? i.e. flush and cleaning/inhibitor fluid added to the CH side.

As Mossy suggests, highly likely it's this mate, you used to get manual over-rides on diverter valves on many systems which used to help, but not so much these days, you'll likely have to call someone out if you're not mechanically minded, be around £80 for then part and then labour costs.

 

[Dave Ewing's Back 'eader]

If yer don't know what the cause of the problem is, it's obvious yer need a heating engineer! I thought Worcester Bosch boilers had millions of years guarantee! I must look at my paperwork.