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The lates is that I think I have found the thermostat. When I turn it up nothing happens. In fact...nothing happens unless the timer on the boiler is on override. Then the water works fine. When the heating & water is on on the Sunvic, the radiators heat up....it seems as though the boiler...

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Hi I've been away for a couple of days. I'll post a photo tonight. Thanks for you continued help. I've set the boiler to the corect setting and I continue to get hot water once the two clocks are set in the on position....which is good. The only problem is that I can't force the boiler...

I don't see any thermostsat unfortunately. Nothing fires on the boiler.

This is great help...thanks.... The Sunvic definitely has both water and heat. I'm not sure where the thermostat on the boiler is though.

Yes...Parameter is 3. It's that timeclock and it has settings (on/off times for both water and heat) Not sure how to set HW to off ...seems as though off controls the whole thing. Not a separate switch for HW and heat I believe the Sunvic is two channel.

Sorry...it 24s.....definitely not a combi

Exactly !! The bolier can be set to Water only...Heat only...or both. And it's definitely on HW only.

I forgot to mention that the boiler appears to be set to control Hot Water only.

Hi. I have just moved into a house with quite a strange set up. A Rehema 28s boiler downstairs with an internal timer and a wireless room thermostat. Upstairs is another timer (Sunvic) next to the hot water cylinder. It seems both timers need to be set at the same time for the...