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- 11 Feb 2021
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Hello - I've checked through the existing posts and there are a few that seem to refer to the same issues as I have but their solutions tend to be around the thermostat. I think my problems are not within the thermostat...
My Worcester Greenstar 24i junior combi boiler doesn't heat the central heating water. It heats the tap water just fine but when the demand comes in from the room thermostat for the central heating to turn on - nothing happens... I've checked the demand from the thermostat is reaching the circuit board (240VAC upon request) and is does (240 VAC on pin Lr). I can see the diverter valve moving up and down during initial switch-on, so that seems OK, I've changed the mains circuit board so that doesn't seem to be the problem either. The blue indicator light is on steady and doesn't flash to show any errors. What I've noticed is that if I put the unit into 'maintenance mode' the central heating works and the radiators get hot, so it seems that the basic functionality of the system is OK... I suspect I have a faulty sensor somewhere but looking at the circuit diagram, I can't see an obvious culprit.***
Any thoughts anyone?
My Worcester Greenstar 24i junior combi boiler doesn't heat the central heating water. It heats the tap water just fine but when the demand comes in from the room thermostat for the central heating to turn on - nothing happens... I've checked the demand from the thermostat is reaching the circuit board (240VAC upon request) and is does (240 VAC on pin Lr). I can see the diverter valve moving up and down during initial switch-on, so that seems OK, I've changed the mains circuit board so that doesn't seem to be the problem either. The blue indicator light is on steady and doesn't flash to show any errors. What I've noticed is that if I put the unit into 'maintenance mode' the central heating works and the radiators get hot, so it seems that the basic functionality of the system is OK... I suspect I have a faulty sensor somewhere but looking at the circuit diagram, I can't see an obvious culprit.***
Any thoughts anyone?