When a heat pump system malfunctions or stops working, the reset button can often be a homeowner’s first line of defense before calling for professional repair. Understanding where the heat pump reset button is, how it works, and when to use it can save time, reduce service costs, and restore home comfort quickly. This complete guide explains everything American homeowners need to know—including troubleshooting steps and safety tips for resetting a heat pump.
Heat Pump Reset Button At A Glance
| Aspect | Details |
|---|---|
| Function | Restores system after lockout, safety trip, or certain malfunctions |
| Typical Location | On or near air handler, outdoor unit, or circuit breaker (varies by model) |
| Common Reasons To Use | Electrical interruptions, system “lockout,” sensor errors, thermostat issues |
| Basic Reset Steps | Power down, wait, press/reset, restart system |
| Risks & Warnings | Repeated tripping signals deeper issues; improper resets might void warranty |
What Is A Heat Pump Reset Button?
A heat pump reset button is a safety and diagnostic feature designed to quickly restart heating and cooling equipment after a minor fault or power interruption. When the system detects certain problems—such as power surges or sensor malfunctions—it may “lock out” as a precaution. Activating the reset button can clear these errors and restore normal operation.
Reset buttons are usually mechanical (you press them by hand), but not every heat pump model has a visible button. Some newer models use digital controls or require resetting at the electrical panel instead.
Why Do Heat Pumps Need Resetting?
Heat pumps are advanced systems with built-in safety controls to prevent damage and hazards. Conditions that may require a reset include:
- Power Surges: A sudden voltage spike can force the system into protection mode.
- Thermostat Malfunctions: Incorrect settings or errors might trigger a lockout.
- Short Cycling: Rapid on-off cycling due to electrical or sensor faults.
- Overheating: If components get too hot, the system stops to cool down.
- Loss of Power: After an outage or breaker trip, the unit may need a reset to resume running.
Resetting helps clear temporary errors, but frequent or repeated shutdowns indicate an underlying issue needing professional attention.
Where Is The Heat Pump Reset Button Located?
Heat pump reset button location varies by manufacturer and model. The button may be found in these common places:
1. Indoor Air Handler Unit
For many split heat pump systems, the reset button is on the air handler. Look for a small red or yellow button on the side or front panel.
2. Outdoor Condenser Unit
Single-package or mini split systems might have the reset button under a removable access panel near the compressor.
3. Electronic Display Panel
Modern variable-speed or smart heat pumps may feature a digital “reset” function—often accessed through the control touchpad.
4. Electrical Breaker Panel
Some models do not have a physical reset button. In these cases, a “hard reset” is performed by switching off the dedicated breaker for several minutes, then turning it back on.
Consult your owner’s manual or manufacturer’s website for the exact location and appearance of your heat pump’s reset feature.
Step-By-Step Guide: How To Reset A Heat Pump Safely
Before resetting your heat pump, remember: Never attempt repairs on electrical parts unless you are qualified. Follow these safety-oriented steps:
1. Turn Off Temperature Controls
Set the thermostat to “off” to prevent automatic startup when power is restored.
2. Power Down The Heat Pump
Switch off the system at the thermostat. Then, either unplug the unit (for window or portable systems) or turn off the dedicated circuit breaker in the main panel for central systems.
3. Wait For System Discharge
Wait at least 3-5 minutes to ensure internal components fully discharge. This step prevents damage from sudden power surges.
4. Locate And Press The Reset Button
If your unit has a physical reset button, press it for 3-5 seconds, then release. If resetting at the breaker, flip the breaker off, wait several seconds, then flip it back on.
5. Reactivate The System
Turn the thermostat back to your desired setting (“Heat,” “Cool,” or “Auto”) and monitor the system for normal operation.
6. Observe For Issues
If the unit cycles on and off repeatedly, fails to start, or the reset button trips again, do not continue resetting—seek help from a certified HVAC technician.
When Should You Use The Heat Pump Reset Button?
The reset button is meant only for specific, temporary issues. Use it if:
- The unit won’t start after a power outage
- The system “locks out” due to a one-time electrical trip
- You’ve checked filters and thermostat settings, but the pump is unresponsive
- The owner’s manual instructs a reset after a storm or brownout
Do not use the reset button repeatedly. If it trips more than once in a short period, there may be a motor, wiring, or refrigerant problem—resetting will not fix these.
What Causes A Heat Pump To Trip The Reset Button?
Common reasons for heat pump reset include:
- Dirty or Clogged Air Filters: Triggering an overheat condition and safety shutdown.
- Blocked Coils Or Vents: Reduces airflow, causing components to overheat.
- Refrigerant Leaks: Low refrigerant can cause compressor protection circuits to engage.
- Frozen Or Overheated Coils: Ice buildup disrupts operation and can cause error codes.
- Electrical Shorts Or Faulty Wiring: Triggers breaker or fuse trips—never repeatedly reset without inspection.
Frequent resets are a red flag of more serious faults and should be addressed by professionals.
How To Find The Reset Button On Popular Heat Pump Brands
Here’s where to look for reset features on some leading American heat pump brands:
| Brand | Location/Type | Model Notes |
|---|---|---|
| Trane | On air handler (red button) or at breaker box | Central/split models |
| Carrier | Near blower compartment or via wall control | Infinity and Comfort series |
| Lennox | Digital panel reset | Signature and Elite models |
| Rheem/Ruud | Inside access panel | Classic and Prestige models |
| Goodman | Manual reset button or via breaker | GSZ, DSZ series |
Always refer to your heat pump’s manual for the exact location and reset procedure.
How To Reset A Heat Pump Without A Reset Button
If your heat pump lacks a visible reset switch, use the circuit breaker “hard reset” method:
- Turn off the system at the thermostat.
- Locate the dedicated circuit breaker for the unit (usually labeled in the electrical panel).
- Switch the breaker OFF and leave it off for at least five minutes.
- Switch the breaker ON and turn the thermostat back on.
This process clears most minor electronic faults in modern systems.
What To Do If The Heat Pump Will Not Reset
If after resetting, the heat pump:
- Fails to start, or only runs briefly
- Makes unusual noises or emits burning smells
- Trips the reset button or breaker again immediately
Do not repeatedly attempt to reset. These are signs of mechanical or electrical problems that require professional attention, such as compressor failure, wiring issues, or control board faults.
Document the symptoms, error messages, and reset attempts—this can help HVAC technicians diagnose the issue faster.
Safety Precautions Before Using The Reset Button
- Always shut off power at the breaker before opening any panels.
- Wear insulated gloves when working near electrical connections.
- Avoid resetting if there is water around the unit or signs of electrical arcing (sparks, burning smell).
- Do not bypass safety controls, sensors, or wiring to “force” a reset.
Improper resets or working on energized equipment can result in serious injury or void your manufacturer’s warranty.
Maintaining Your Heat Pump To Reduce Need For Resets
Routine maintenance helps prevent most conditions that trigger safety cutouts or reset requirements:
- Replace filters every 1-3 months during heavy use.
- Clear supply and return vents of obstructions (furniture, curtains, debris).
- Schedule annual professional service to check refrigerant pressure, electrical connections, and control systems.
- Keep outdoor unit clear of vegetation, snow, and leaves for proper airflow.
Maintaining your system ensures long life, optimal efficiency, and reduces the risk of emergency resets.
Reset Button Vs. Breaker Tripping: Key Differences
| Reset Button Trip | Breaker Trip |
|---|---|
| Usually signals internal system error or overheat | Indicates electrical overload or short circuit in wiring |
| Can often be safely reset once after cause is removed | Should not be reset repeatedly—potential fire hazard |
| May be caused by filter, thermostat, or refrigerant issues | Often signals wiring faults, power surge, or component failure |
Don’t ignore frequent breaker trips, as they pose greater risk and require professional troubleshooting.
Common Heat Pump Error Codes Related To Resetting
Many heat pumps show error codes on the thermostat or control panel when a reset is needed, such as:
- E1/E2: Indoor or outdoor sensor error (try resetting first, then check for blocked air flow)
- H1/H3: High or low pressure cutout (reset only after cleaning filters and checking airflow)
- P1/P2: Power supply or communication error (use reset procedure outlined above)
Always consult the owner’s manual for code definitions and tailored reset instructions.
Do’s And Don’ts: Heat Pump Reset Button Use
| Do | Don’t |
|---|---|
| Use after storms, brief outages, or one-time system “lockouts” | Press repeatedly without addressing root causes |
| Power off and follow safety instructions | Open electrical panels unless power is off and you’re trained |
| Check owner’s manual for your specific model’s instructions | Ignore strange noises, burning smells, or repeated trips |
| Replace dirty filters and keep vents clear | Bypass fuses or sensors in attempt to “force” a reset |
Proper reset use restores comfort quickly for minor and infrequent errors.
Heat Pump Reset Button FAQ
How Often Can I Use The Reset Button?
You should not need to reset your heat pump more than once or twice a year. More frequent need suggests an underlying issue that requires service.
Does Every Heat Pump Have A Reset Button?
No, some models use digital controls or require resetting at the breaker. Check your unit or manual for exact instructions.
Will Resetting Fix All Heat Pump Problems?
No, resetting only clears minor electronic and sensor faults. Mechanical, refrigerant, or persistent electrical issues must be repaired by professionals.
Is The Reset Button The Same As A Circuit Breaker?
No. The reset button is part of the heat pump’s safety system, while circuit breakers protect home wiring and equipment from overloads.
Should I Try To Reset After A Power Outage?
Yes, if the heat pump does not resume operation on its own, follow the reset procedure for your model. Check for visible damage or unusual smells before powering back on.
Summary: Fast Facts For Homeowners
- The heat pump reset button provides a simple, temporary fix for common startup or error conditions.
- Locate your button or understand breaker reset techniques for your specific model.
- Always prioritize safety and system maintenance to avoid recurring issues.
- If in doubt, or if the system fails to reset, consult a licensed HVAC professional for diagnosis and repair.