Electric Furnace Reset Button Guide: Location, Use, and Troubleshooting

The electric furnace reset button is a small but critical component that can restore power after an overload or fault. This guide explains where to find the reset button, when to press it, and what to do if it keeps tripping, providing practical troubleshooting and safety steps for U.S. homeowners. Always prioritize safety and consider professional help for persistent issues.

Item	Quick Summary
Common Location	On furnace control panel, near breaker, or on motor housing
Primary Cause For Trip	Overload, short circuit, overheating, or motor failure
First Steps	Turn off power, wait 10–30 minutes, inspect, then press reset
When To Call Pro	Repeated trips, burning smell, visible damage, or no reset response

What Is An Electric Furnace Reset Button

The electric furnace reset button is a manual safety switch designed to protect the furnace’s electrical components from damage caused by overloads or faults. It typically interrupts power to the blower motor, control board, or heating elements until a user or technician verifies safe conditions and restores power.

Where To Find The Reset Button On An Electric Furnace

Location varies by model, but common places include the blower motor housing, the furnace control panel behind an access panel, or an external disconnect box. Some furnaces have a red or black small button labeled “Reset.” Others require removing a small panel to access the motor or control board where the reset mechanism sits.

Specific Location Tips

• Check near the blower motor for a button protruding from the motor or motor cover.
• Inspect the main control board area behind the service panel for push-button resets.
• Look at the exterior service disconnect or breaker panel for an inline reset device.
• Consult the furnace owner’s manual for model-specific location and labeling.

Why The Reset Button Trips

The reset button trips to prevent electrical damage and fire risk. Common causes include motor overload, overheating due to poor airflow, short circuits, failed capacitors, worn bearings, or blocked vents. External electrical faults or incorrect wiring can also trigger the safety mechanism.

Common Causes Explained

• Overload: Excess current to the blower motor from mechanical strain or a failing motor.
• Overheating: Restricted airflow or dirty filters causing heat buildup.
• Electrical Short: Damaged wiring or failed components creating a short circuit.
• Component Failure: Capacitor or motor faults that draw abnormal current.

How To Safely Reset An Electric Furnace

Resetting should be methodical: confirm safety, inspect for visible issues, and use the reset button per the manufacturer’s guidance. If unsure, stop and call a qualified technician.

Step-By-Step Reset Procedure

1. Turn Off Power: Switch off the furnace using the thermostat, furnace switch, and main breaker to eliminate electrical risk.
2. Wait: Allow 10–30 minutes for internal components to cool and for a thermal trip to reset automatically if applicable.
3. Inspect: Check filters, vents, wiring, and the motor area for visible damage, burning smell, or loose connections.
4. Access Reset Button: Remove the access panel if necessary while keeping power off. Locate the reset button on the motor or control board.
5. Press Reset: With power still off, press the reset button firmly then restore power. Observe the furnace startup for normal operation.
6. Monitor: Run the system for several cycles, watching for noise, smells, or re-tripping.

Troubleshooting If The Reset Button Keeps Tripping

A single trip after a legitimate overload may be resolved by a reset. Repeated trips indicate a persistent fault requiring deeper troubleshooting or professional repair.

Diagnostic Checklist

• Check Airflow: Replace dirty filters and clear blocked vents. Poor airflow is a leading cause of overheating.
• Inspect Motor And Bearings: Listen for unusual sounds and feel for excessive motor heat indicating mechanical failure.
• Examine Wiring And Connections: Look for frayed wires, burned insulation, or loose terminals that suggest shorts or high resistance.
• Test Capacitor And Contactor: Faulty capacitors increase motor current; a failing contactor can cause intermittent power spikes.
• Measure Current Draw: A qualified technician can measure amperage to the motor to confirm overload conditions.

When The Furnace Won’t Reset

If the reset button does not respond the first time, do not repeatedly press it. Persistent non-response may indicate a blown internal fuse, failed reset switch, or severe electrical fault. In such cases, shut down power and contact a licensed HVAC electrician.

Safety Precautions When Working With The Reset Button

Electric furnaces operate on high voltage and can be dangerous. Strict safety measures reduce risk while inspecting or resetting the system.

• Always turn off the main power breaker before accessing internal components.
• Avoid touching wiring or terminals unless qualified to do so.
• Wear insulated gloves and eye protection when handling electrical parts.
• If a burning smell, smoke, or visible damage exists, keep power off and call a professional.
• Do not bypass or tape over a reset button or safety device; this creates a fire hazard and voids warranties.

When To Call A Professional HVAC Technician Or Electrician

Some issues require licensed professionals for safe, code-compliant repair. Contact an HVAC technician or electrician when the reset button trips repeatedly, when electrical components show damage, or when the cause is uncertain.

• Repeated Trips: Indicates an unresolved fault that needs diagnostic testing.
• Damaged Wiring or Components: Visible burning, melting, or charring requires immediate professional attention.
• Unusual Noises or Smells: Mechanical failure or electrical arcing must be inspected.
• No Reset Response: May indicate internal failure of the reset mechanism or control board.

Preventive Maintenance To Avoid Reset Button Trips

Regular maintenance reduces the chance of overloads and protects the electrical and mechanical components of the furnace.

• Replace or clean air filters every 1–3 months depending on usage.
• Keep vents and return grilles free of obstructions to maintain adequate airflow.
• Schedule annual HVAC inspections to test motors, capacitors, and controls.
• Lubricate bearings and inspect belts where applicable to reduce mechanical strain.
• Ensure the furnace area is clean, dry, and well-ventilated to prevent overheating.

Cost Considerations And Typical Repairs

Repair costs vary by cause and region. Simple fixes like a new filter or capacitor are relatively inexpensive. Motor replacement, control board repair, or wiring work can be costly and should be estimated by a professional.

Issue	Typical Cost Range (U.S.)
Filter Replacement	$10–$60
Capacitor Replacement	$75–$250
Blower Motor Repair/Replacement	$300–$900+
Control Board Repair	$200–$700+

Frequently Asked Questions About Electric Furnace Reset Buttons

How Long Should One Wait Before Pressing The Reset Button?

Wait at least 10–30 minutes to allow thermal protections to cool. If overheating caused the trip, immediate reset may lead to another trip or damage.

Is It Safe To Reset The Button More Than Once?

Resetting once after inspecting for obvious issues is acceptable. Repeated resets without identifying the cause are unsafe and may worsen a hidden fault.

Can Homeowners Replace A Faulty Reset Switch?

A homeowner with electrical experience may replace a switch, but because furnaces involve high voltage and safety devices, relying on a licensed technician is recommended to ensure correct parts and safe installation.

Will A Tripped Reset Button Void My Warranty?

Using the reset button as intended does not void warranties. However, bypassing safety devices or performing improper repairs can void warranty coverage.

Resources And Further Reading

Consult the furnace manufacturer’s manual and NFPA electrical safety guidance for detailed model-specific instructions. Local utility and HVAC associations provide resources for licensed contractor searches and energy-efficiency practices.

If the reset button trips repeatedly or the furnace shows electrical damage, contacting a licensed HVAC technician or electrician is the safest course of action. Regular maintenance and prompt repairs help prevent future trips and improve system reliability.