The Heil furnace reset button is a safety and troubleshooting feature that temporarily clears fault conditions on many Heil models. This guide explains what the reset button does, common reasons it trips, step-by-step safe reset procedures, diagnostic checks to perform, when to call a professional, and tips to prevent recurrent trips.
| Issue | Likely Cause | Immediate Action |
|---|---|---|
| Short-Term Trip | Temporary electrical surge or sensor glitch | Attempt a controlled reset |
| Frequent Trips | Faulty limit switch, flame sensor, or blocked vent | Run diagnostics; inspect and clean; call technician |
| No Power | Blown fuse, tripped breaker, or wiring fault | Check breakers and power; do not repeatedly reset |
What The Heil Furnace Reset Button Does
The reset button on a Heil furnace acts as a manual override to clear certain safety lockouts and faults triggered by the control board or sensors. It is designed for temporary use to restore operation after a momentary fault or startup error.
Important: The reset is not a fix for ongoing mechanical or electrical failures. Repeated use without diagnosing underlying causes can cause further damage and void warranties.
Common Reasons The Reset Button Trips
Understanding why the reset button trips helps target corrective actions. Common causes include blocked vents, flame sensor issues, induced draft motor failures, limit switch activations, and power or ignition problems.
Short power interruptions or a temporary ignition failure can also set the furnace into a lockout state that requires a reset to resume normal operation.
Safety Precautions Before Resetting
Always observe safety steps before attempting a reset: turn off power to the furnace via the thermostat switch or circuit breaker, wait a few minutes to allow cooling, and inspect the area for smells of gas or visible damage.
If a strong odor of gas is present, do not press the reset button. Leave the premises immediately and call the gas company or emergency services.
How To Safely Reset A Heil Furnace
Follow these steps for a controlled reset procedure on most Heil furnace models. These are general instructions; consult the owner’s manual for model-specific guidance.
- Turn Off Power: Switch off the furnace power at the service switch or breaker.
- Wait: Allow 5 minutes for the control board and gas valve to discharge and sensors to settle.
- Locate Reset Button: The reset button is typically a small, recessed button labeled “reset” on or near the control board or blower compartment door.
- Press Once: Press and release the button once. Do not repeatedly press it.
- Restore Power: Turn the power back on and observe the furnace through a full start cycle.
- Monitor: Watch for normal ignition, blower operation, and steady burner flame. If the furnace returns to lockout or trips again, stop and proceed to diagnostics.
Diagnostic Checks After A Reset Trip
If the furnace trips again or will not come out of lockout, perform the following checks before attempting another reset. These inspections often reveal the root cause.
- Check Error Codes: Many Heil furnaces flash LED codes. Record the sequence and consult the manual for meaning.
- Inspect Air Filters: A clogged filter can cause overheating and limit switch trips. Replace if dirty.
- Examine Vents and Flues: Ensure outdoor vents and exhaust flues are clear of debris, bird nests, snow, or ice.
- Clean Flame Sensor: Corrosion or soot on the flame sensor can cause ignition failure. A gentle cleaning with fine emery cloth or alcohol can improve sensing.
- Verify Power Supply: Check the furnace breaker and thermostat wiring. Loose or corroded connections cause intermittent faults.
When Not To Use The Reset Button
Repeatedly pressing the reset button without diagnosing problems is unsafe. The reset should not be used when there is a persistent gas smell, visible fire or smoke, or repeated trips indicating a defective component.
Do Not Reset if the furnace exhibits unusual noises like banging, rattling, or continuous clicking, as these can indicate blower motor failure, combustion problems, or electrical arcing.
Common Component Failures That Require Repair
Some faults that commonly trigger the reset include a failing flame sensor, bad ignition control, faulty limit switch, clogged condensate drain, or malfunctioning pressure switch.
These issues typically require cleaning, adjustment, or replacement. A qualified HVAC technician should perform complex electrical or combustion-related repairs to ensure safety and compliance with local codes.
DIY Troubleshooting Steps Before Calling A Technician
Homeowners can perform safe, non-invasive checks that often resolve simple issues. These steps reduce technician visits and help identify when professional help is necessary.
- Replace Or Clean Air Filters: Improves airflow and reduces overheating trips.
- Clear Outdoor Intake/Exhaust: Remove debris around vent terminations.
- Inspect Thermostat Settings: Ensure the thermostat is set correctly and batteries are fresh.
- Reset Power: Turn off power for 10 minutes, then restore to reset control boards.
- Clean Flame Sensor: Remove and gently clean the sensor rod following manufacturer guidance.
When To Call A Professional
Contact an HVAC professional if the furnace continues to trip after basic maintenance or if diagnostics point to electrical, gas valve, or combustion component failures.
Also call a technician when error codes indicate pressure switch faults, repeated ignition lockouts, or when any repair requires opening sealed combustion chambers or handling gas components.
Replacement And Warranty Considerations
When a component must be replaced, verify model compatibility and check warranty status. Heil furnaces are covered by manufacturer warranties on heat exchangers and parts for specified time periods; unauthorized repairs may void the warranty.
Keep the furnace model and serial number handy when scheduling service. Original-equipment parts and certified installers help maintain warranty coverage and system reliability.
Preventive Maintenance To Reduce Reset Trips
Regular maintenance is the best defense against reset button trips. Annual HVAC tune-ups by a licensed technician reduce failures and extend system life.
- Annual Inspection: Includes burner adjustment, heat exchanger check, and combustion analysis.
- Filter Replacement Schedule: Replace disposable filters every 1–3 months depending on usage.
- Venting And Flue Check: Ensure vents are unobstructed and properly sealed.
- Condensate Drain Maintenance: Keep condensate traps and drains clear to avoid pressure switch trips.
Understanding Heil Furnace Error Codes
Heil furnaces often use LED flash codes to indicate specific faults like flame failure, pressure switch issues, or limit trips. Recording and referencing these codes speeds troubleshooting.
Consult the furnace manual for code definitions. If the manual is unavailable, Heil customer support or the HVAC technician can interpret the codes and recommend corrective actions.
Frequently Asked Questions About The Reset Button
How Many Times Can The Reset Button Be Pressed?
The reset button should be pressed only once per fault event. Repeated presses without diagnosis are unsafe and may cause damage or mask serious issues.
Is Resetting A Heil Furnace Free?
Resetting the furnace manually is free, but if a technician is required for diagnostics or repairs, service fees apply. Preventive maintenance reduces unexpected service costs.
Can A Homeowner Replace The Reset Button?
Replacing the physical reset switch is a low-complexity electrical task but should be performed by someone comfortable with electrical safety and furnace wiring. For safety and warranty reasons, many homeowners prefer a licensed HVAC technician.
Will Resetting Fix Flame Sensor Issues?
No. Resetting may temporarily clear a lockout, but flame sensor issues typically require cleaning or replacement to restore reliable ignition.
Resources And Further Reading
For model-specific procedures, homeowners should consult the Heil owner’s manual and product literature. Manufacturer support and certified dealer networks provide authorized service and replacement parts.
Local building codes and utility company recommendations also provide safety guidance for combustion appliances and ventilation standards.
Key Takeaways
Use The Reset Button Sparingly and only after observing basic safety checks. If trips recur, perform diagnostic steps or call a professional to address faulty components. Regular maintenance and timely repairs reduce the likelihood of resets and improve furnace longevity.