Use the MASTER switch on your HVAC system or the electrical box or circuit breaker box (a grey metalic box) to power off your HVAC system which is usually located on the side of the hous, grage, basement, behind or next to condenser.
Use the MASTER switch on your HVAC system or the electrical box or circuit breaker box (a grey metalic box) to power off your HVAC system which is usually located on the side of the hous, grage, basement, behind or next to condenser.