Step 1: Power off your HVAC system using the:
1. The master switch OR 2. The circuit breaker
Step 2: To be on the safe side, ensure that your system is completely switched off.
Double-check that:
1. No air is coming out of air vents
2. Main flame is extinguished in case of boiler
Step 3: Go to your already installed thermostat and remove it from the wall.
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