Manually resetting a residential HVAC system—such as a heat pump, air conditioner, or furnace—to clear temporary error codes, resolve system lockouts, or recover from a power surge is a straightforward electrical process performed at your home's main service panel. First, go to your indoor wall thermostat and switch the system mode setting to "Off" to halt any active control signals. Second, go to your electrical breaker panel and locate the circuit breaker switches dedicated to your HVAC equipment, which typically include a breaker for the indoor air handler and a separate heavy-duty breaker for the outdoor condensing unit. Flip both circuit breakers fully to the "Off" position. Third, wait a mandatory minimum of five full minutes to allow internal electrical components, relays, and compressor capacitors to fully discharge. Finally, switch both breakers back to "On." You can verify success when normal operation resumes.
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