Ideal Logic 30 No CH

[quad121]

please can someone advise on a possible fix?
I have a Ideal Logic 30 which is supplying hot water but isn't supplying the Central Heating. If you set the thermostat to call for heating the boiler shows a 'c' showing that it's received the thermostat signal but the Pilot light doesn't light?
I've tried turning he boiler off and re starting it but doesn't fix the problem.
Any help you can advise would be very much appreciated
Paul

 

[Jadele]

just the obvious one first that the mode switch is set to HW and CH on the boiler front

 

[quad121]

Thanks Jadele for your prompt reply Yes the switch is set to CH and Water unfortunately It worked perfectly fine yesterday and hasn't been touched. I just turned up the thermostat tonight as usual and after 30 mins or so relized that the radiators weren't getting hot!

 

[Jadele]

Ah well was worth a shot lol. the boiler is seeing the demand and you can get hot water would suggest the pressure is high enough??? it could be the diverter valve inside is stuck in the hot water position. Mine went flakey in my old boiler but was intermittent and usually my CH worked and not the hotwater. Problem is you need to open the boiler to see if the switch is being pressed and released as you turn the hot taps on and off. You could try turning the hot water on full and off quick to see if it jolts the valve a little and starts working. Other than that its probably a cover off job and a bit of investigation.

 

[quad121]

Thanks Jadele. I've checked the pressure it sitting around the 2 bar mark. I'll try your suggestion about the hot water on/off first then I suppose it's the cover off!

 

[Jadele]

yeah doubt it will work even if it were the problem but who knows.

 

[quad121]

Thanks for your help

 

[Jadele]

just had a quick look for the service manual. Is this your boiler http://idealboilers.com/wp-content/uploads/sites/2/2014/01/Logic-Combi-Installation-Manual.pdf may help?. The actuator for the diverter valve is shown in part 52 but its quite closed in looking at it. you could always try taking off the sensor (switch) off the valve and see if it fires up if not press the switch in and see if it does. Bear in mind you are supposed to Gas Safe to do this.

 

[quad121]

Hi yes it's the 30. I'll give that a go