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    Central heating only works with Hot Water ON

    Got a DRAYTON motor from Screwfix. Slot it in. Half hour in, and still purring away!!! Actuator was OK it seems ! Boom! Thanks troop. That diagram John is GOLD!
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    Central heating only works with Hot Water ON

    When the boiler kicks in (central heating only) - I can switch it off/on with the room thermostat. That is a VERY helpful diagram though. Might take a punt, replace the motorised valve (only the motor). If the micro switch is playing up, that would be it. What do you reckon?
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    Central heating only works with Hot Water ON

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    Central heating only works with Hot Water ON

    room thermostat OK, also did a test with a multimeter. At the point when boiler switches off, the thermostat is still in closed position. Boiler thermostat(s) OK too as no issues heating the hot water tank all day long. Sludge in central heating pipework? but then why are all the radiators...
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    Central heating only works with Hot Water ON

    Thank you for your reply and taking the time. The motorised valve for the central heating does indeed come on, and fires up the boiler - only that after few minutes boiler shuts down and the valve goes to closed position again, and after another 5 minutes, comes ON for another 5 minutes.... Only...
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    Central Heating only works when Hot Water is ON

    Hi, I have a gravity fed system with 2 separate valves for hot water and central heating. Here's what's happening, and I'm really scratching my head here: The only way to make the central heating work: - Switch off the central heating from the controller. - Bypass the central heating valve and...
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    Central heating only works with Hot Water ON

    Hi, I have a gravity fed system with 2 separate valves for hot water and central heating. Here's what's happening, and I'm really scratching my head here: The only way to make the central heating work: - Switch off the central heating from the controller. - Bypass the central heating valve and...
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