Keeping Nest thermostat powered with integrated control


Old 06-20-20, 01:05 PM
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Keeping Nest thermostat powered with integrated control

My Nest thermostat is powered by the R and W wires, however I recently had a Mitsubishi integrated control (PAC-WHS01HC-E) installed which essentially opens the circuit for the W wire until the outside temperature falls below a certain temperature. However, in doing this it also means my Nest thermostat just shows a "no power" signal during much of the year. Short of running a common wire to the thermostat is there any way to accomplish this?
Old 06-20-20, 05:16 PM
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Welcome to the forums.

Unfortunately in your application you will need a C connection.
You could also use a wall wart somewhere near the nest to supply it with 24vac power.
In the link below are some examples.
24vAC wall wart

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