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5-Troubleshooting
If your MRCOOL Smart Thermostat doesn't turn on, try these steps:
1. Check the backplate wire connections and ensure they are inserted properly into the terminals.
2. In the case of one R-Wire, make sure it is inserted into the RC terminal.
R or RC or RH → RC
In the case of more than one R-Wire, make sure RH is inserted into the RH terminal and RC or R is inserted
into the RC terminal.
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