When a power outage hits, your heat pump may not start up smoothly once power returns. It might blow the wrong temperature air, refuse to run, or trip the circuit breaker repeatedly. The good news is that most of the time, you can fix this by resetting the system properly.
Resetting a heat pump is a simple but important process that allows the equipment to clear internal errors and safely restart. In this guide, we’ll walk you through how to do it, what to check before and after, and when to call a professional for help.
Why Your Heat Pump May Need a Reset
Modern heat pumps depend on electronic control boards, sensors, and safety switches. When power cuts suddenly, those electronics can become stuck in a locked or confused state. A reset clears the error memory and brings the system back to its normal operating mode.
Outages can also cause small voltage spikes that trigger built-in protection circuits. Resetting ensures those safety controls disengage once the power supply stabilizes.
If you skip this step, your system might keep showing an error light, blow lukewarm air, or fail to run entirely.
Safety First: What to Do Before Resetting
Before touching the equipment, take a moment to prepare. A few small steps will protect you and your system from further damage.
Here’s what to do before you begin:
- Turn your thermostat to “Off.” This prevents the system from starting unexpectedly during the reset.
- Check your breaker panel to confirm power has been restored and there are no tripped breakers.
- Inspect the area around the outdoor unit for standing water, fallen branches, or visible wiring damage.
- Put on safety gloves and shoes with good grip before handling electrical panels.
- If you see any signs of burnt wires, corrosion, or water inside the disconnect box, do not continue. Call a technician immediately.
These simple steps ensure your reset process starts safely and prevents more serious damage.
Step-by-Step: How to Reset Your Heat Pump
Once everything looks safe, you can begin the reset process. Most systems follow a similar sequence:
1. Turn Off the Thermostat
Set your thermostat to “Off” so it stops sending power to the heat pump while you work.
2. Shut Off Power at the Breaker or Disconnect Switch
Locate your outdoor disconnect switch or the dedicated breaker for the heat pump. Turn it off completely. This cuts power to both indoor and outdoor components.
3. Wait Five to Ten Minutes
Leave the power off for several minutes. This allows internal relays and capacitors to discharge fully, clearing out any stored voltage or software errors.
4. Turn Power Back On
Flip the breaker or disconnect switch back to “On.” The system is now ready to reboot.
5. Turn the Thermostat Back On
Return to your thermostat and set your preferred temperature and mode. Wait a few minutes for the blower and compressor to start.
If the heat pump starts smoothly and maintains consistent airflow, the reset worked. However, if your system still won’t restart or is blowing inconsistent air after a reset, schedule professional help through our AC Repairs in Sierra Vista, AZ service.
Troubleshooting: What If It Still Doesn’t Work?
If your system does not restart after a proper reset, there may be an underlying issue that needs professional attention.
Here are common signs of trouble:
- The breaker trips again when you restore power
- The outdoor fan hums but does not spin
- The blower runs but no heat or cool air comes out
- The thermostat flashes an error message
- You hear clicking, grinding, or buzzing noises
Try these checks before calling for service:
- Confirm all breakers are fully on and not half-tripped
- Check your thermostat batteries or power connection
- Make sure the outdoor unit’s disconnect switch is turned on
- Inspect your air filter and replace it if it looks dirty
- Clear away debris from around the outdoor coil
If your system still refuses to run or behaves erratically, contact a professional for heat pump repair and maintenance. Continuing to reset a malfunctioning unit can lead to component damage or electrical failure.
Preventing Future Heat Pump Lockouts
Power outages are not always avoidable, but you can reduce the risk of future issues by adding protection and staying proactive with care.
A few long-term habits make a big difference:
- Install a surge protector for your HVAC system
- Schedule preventative maintenance every spring and fall
- Keep the outdoor unit clear of vegetation and obstructions
- Replace filters regularly to maintain proper airflow
- Upgrade to a smart thermostat for better system monitoring and control
These steps not only prevent power-related lockouts but also improve overall efficiency and comfort.
When to Call a Professional
A reset is meant for minor control issues, not for repairing damaged parts or wiring. Call an HVAC technician if:
- The unit still won’t start after a full reset
- You smell burning or see visible damage
- The system runs inconsistently or makes loud noises
- Breakers trip repeatedly
Professional service will ensure the problem is identified correctly and repaired safely.
At Saguaro Air Solutions, our licensed technicians provide complete diagnostics, mini-split and heat pump service, and preventive maintenance to keep your home comfortable year-round.
On A Final Note;
Resetting a heat pump after a power outage is an easy and effective way to get your system running again, as long as it is done patiently and safely. It helps clear residual power, resets the control board, and ensures your equipment restarts under stable conditions.
If you ever feel unsure or your system doesn’t respond after a reset, don’t risk electrical damage. Schedule a service visit with Saguaro Air Solutions for expert repair and maintenance.
Your comfort depends on a reliable system, and professional attention ensures it stays that way, even after the power goes out.
Call (520) 678-1026 today or schedule service online to get your heat pump inspected and running smoothly again.
