Wire Battery thermostat

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Hi I have wireless heat miser thermostats for my UFH. These are battery and sit next to a light switch. They seem to drain batteries very quickly. Wondering if it would be possible to hard wire to a light switch. The thermostats take 4 AAA batteries. Picture below

Thanks

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No you can’t wire to light switch and no photos visible. What about a different thermostat?
 
Hi,

Theoretically, the batteries are probably connected in series (although this would have to be checked), so you could solder the output from a 6V DC power supply unit (PSU) to the appropriate battery terminals (...and you would have to find a suitable place to house the PSU).

Again, theoretically, you could connect a PSU to a lighting circuit. However most lighting circuits carry the neutral wire in the ceiling rose. Only live and switched live could be available at the switch; no direct connection to the switch may be possible.

Plug in 6V PSU's are easier to find and you wouldn't have to hardwire them.

Given these issues, as CBW says, it may be easier to consider a different thermostat!
Or, invest in some good quality rechargeable batteries :)
 

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