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Hi all

I have underfloor heating downstairs and radiators, plus two towel radiators upstairs. I have a Heatmiser UH8 and the radiators are connected to the the 5th zone and the towel radiators are connected to the 8th . Now, if I remember rightly from manuals, if you want to hook up a towel radiator, the recommended zone to connect them to is the 8th zone.

The radiators upstairs, as I said are off the 5th zone and the UH8 has a constant dim lit bulb showing for that zone.

Here's where my real question is. If I put any of my underfloor heating zones on, they work fine and if the TRVs on the radiators (not towel) are open, they get hot. If I put the towel radiators on, they get hot, but also, the upstairs radiators get hot. If I out just the upstairs radiators on, nothing else gets hot.

I was told that any under floor heating zone would cause the radiators to heat, but the towel radiators would be separate. This makes sense. There is a thermostat for the radiators upstairs as well one for the towel radiators.

If the towel radiators coming on causes the radiators to get hot too, why bother putting in another thermostat for the upstairs radiators when any other zone will cause them to get hot? This doesn't make sense to me

Has anyone come across this before?

Thanks
 
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