When resetting a central air conditioning system after a power surge, compressor lockout, or electrical fault, you should leave the system turned completely off for at least 5 to 10 minutes. Leaving the AC off for this brief window allows the high-pressure refrigerant gases inside the sealed compressor lines to equalize fully. If you attempt to turn a compressor back on immediately while high pressure remains trapped against the motor, it can cause the thermal overload switch to trip or damage the compressor. Verification: Turn the thermostat back to cooling mode after 10 minutes and listen for the system to restart safely.
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