Armstrong Air Furnace Reset Button: Location, Use, and Troubleshooting

The Armstrong Air furnace reset button is a common troubleshooting step for homeowners experiencing intermittent blower or ignition issues. This guide explains where to find the reset button, when to press it, step-by-step procedures, safety precautions, and how to diagnose persistent problems that require professional service. Follow safety steps and manufacturer recommendations to avoid damage or voiding warranties.

Issue	Reset Button Action	Expected Result
No blower or stubborn lockout	Press reset once after power off	Blower may restart or system proceeds to normal operation
Ignition failure	Wait 5 minutes, press reset once	System attempts restart; persistent failures indicate deeper fault

What The Armstrong Air Furnace Reset Button Is

The reset button on an Armstrong Air furnace is a manual override designed to clear certain electronic or safety lockouts and initiate a fresh start sequence. It commonly addresses issues like a motor that has tripped due to overheating or a control board that has latched off after a fault. It is not a fix for repeated or underlying mechanical or electrical failures.

Where To Find The Reset Button

On many Armstrong Air furnace models the reset button is located inside the blower compartment or near the control panel behind the access panel. It may be a small red or black push-button labeled “Reset” or be integrated into a safety switch assembly. Consult the furnace model’s user manual for an exact location.

When To Use The Reset Button

The reset button should be used when the furnace is unresponsive, the blower fails to start after thermostat calling for heat, or after a thermal overload trips the motor. It is also used following certain fault codes when the control board recommends manual reset. Do not repeatedly press the reset button without diagnosing the cause.

Safety Precautions Before Pressing Reset

Turn off power to the furnace at the service switch or circuit breaker before removing access panels. Allow the furnace to cool for several minutes if overheating is suspected. Avoid contact with live electrical components and wear gloves if necessary. If unfamiliar with HVAC equipment, contact a technician.

Step-By-Step: How To Reset An Armstrong Air Furnace

Preparation

Turn thermostat to Off, switch off power at the furnace service switch, and open or remove the access panel to the blower compartment. Locate the reset button following the model-specific diagram in the owner’s manual.

Performing The Reset

Wait at least five minutes after power-off to allow capacitors to discharge. Press and release the reset button firmly once. Replace the access panel, restore power at the service switch or breaker, set the thermostat to desired setting, and observe furnace startup for normal operation.

If The Furnace Does Not Restart

If the furnace still does not start after a reset, wait five minutes before any additional attempts. Repeated resets without resolving the root cause can damage components. Record any error codes or unusual noises for technician diagnosis.

Common Causes That Make Reset Necessary

• Overheated Blower Motor: Restricted airflow from dirty filters or closed vents can cause motor thermal trips.
• Ignition Or Flame Sensor Issues: Dirty flame sensors or ignition failures may cause lockouts requiring manual reset.
• Control Board Faults: Voltage spikes or component failures can latch the board in a protective state.
• Limit Switch Trips: Excessive heat in the heat exchanger due to airflow problems trips safety switches.

Troubleshooting Steps If Reset Doesn’t Work

Confirm power at the service switch and breaker, check and replace a dirty air filter, ensure vents and returns are open, and inspect the condensate line (if present) for blockages. Listen for humming or clicking that indicates motor or relay activity. Note any LED or display error codes from the control board.

When To Call A Professional

Contact an HVAC technician if the furnace requires repeated resets, emits burning smells, shows error codes that persist, cycles on and off rapidly, or if the homeowner is uncomfortable with electrical or gas components. A licensed technician can safely diagnose control board, gas valve, ignition, or heat exchanger problems.

Potential Risks And Warranty Considerations

Repeated manual resets can stress control electronics and may void certain warranties if the unit has been improperly serviced. Always follow the manufacturer’s recommended maintenance schedule and avoid modifications that could jeopardize warranty coverage.

Maintenance Tips To Prevent Reset Issues

• Replace or clean HVAC air filters every 1–3 months depending on use and home conditions.
• Keep vents and return grilles unobstructed and maintain balanced airflow throughout the home.
• Schedule annual preventive maintenance with a licensed technician to inspect ignition, burners, heat exchanger, and electrical connections.
• Keep the furnace area clean and clear of debris to prevent airflow restriction and overheating.

Model-Specific Notes

Different Armstrong Air furnace models use varying control layouts. Some models incorporate an electronic control board with diagnostic LEDs instead of a dedicated reset button. For precise instructions and diagrams, reference the model number on the furnace data plate and consult the official Armstrong Air manual or dealer resources.

Frequently Asked Questions

Is It Safe To Press The Reset Button Frequently?

No. Frequent resets indicate an unresolved issue. Repeated pressing can mask problems and potentially damage components. Use the reset sparingly and investigate the root cause.

How Long Should One Wait After Pressing Reset?

After pressing the reset button and restoring power, the furnace should begin its start sequence within a minute. If it does not, allow five minutes before attempting a second reset or troubleshooting further.

Will A Reset Fix A Noisy Furnace?

A reset may temporarily restart equipment but will not fix mechanical noises from bearings, blower wheel contact, or gas valve issues. Noises should be inspected by a technician to prevent long-term damage.

Can A Homeowner Replace The Reset Button?

Replacing a reset switch may be possible for someone experienced with HVAC electrical repairs, but improper work risks safety and warranty coverage. It is recommended to hire a licensed HVAC technician for parts replacement.

Key Takeaways

Use the Armstrong Air furnace reset button only as a controlled troubleshooting step, confirm proper power and airflow, document error codes, and perform routine maintenance to prevent recurring trips. Persistent failures require professional diagnosis to ensure safe and reliable operation.