The Arcoaire furnace reset button is a built‑in safety feature designed to restart the furnace after a fault. This guide explains what the reset button is, where to locate it on common Arcoaire models, and how to reset safely. It also covers when a reset can resolve the issue and when to call a professional for more complex problems. The information focuses on practical steps, proper safety, and common troubleshooting scenarios for American homes.
What Is The Arcoaire Furnace Reset Button
The reset button on Arcoaire furnaces is a dedicated control used to clear a fault and restart the ignition or blower sequence. It is not a simple on/off switch; it signals the furnace to exit a fault state after a limit switch trip or ignition lockout. Not every Arcoaire model has a reset button, so users should consult the owner’s manual for model-specific details and locations.
Location varies by model. In many furnaces, the button is behind the blower access panel on the front of the cabinet and appears as a red or orange button. Some models require removing the lower service panel to access the control board or a reset switch on the circuit board. If the button isn’t visible, the unit may use a power cycle instead of a dedicated reset.
How To Reset An Arcoaire Furnace
- Turn off power at the furnace switch and at the main electrical panel to ensure a safe reset process.
- Open the service panel to locate the reset button. If you cannot find it, refer to the manual or note any nearby labels on the control board.
- Wait about 30 seconds to allow the control board to fully power down and reset.
- Press and hold the reset button firmly for 1–2 seconds, then release. Some models require a quick press; others respond to a brief hold, so follow the button’s feel and any on‑panel guidance.
- Close the panel and restore power. Set the thermostat to heat and a temperature above the current room temperature to start the ignition sequence.
- Observe the furnace. If the burners ignite and run normally, the reset was successful. If there is no ignition, if the LED indicator blinks a fault code, or if cycling continues, proceed to troubleshooting or contact support.
Common Reset Scenarios And Error Codes
The following table highlights frequent situations that may prompt a reset and how to respond. Always refer to the specific model manual for exact fault codes and meanings.
| Scenario | Possible Cause | Recommended Action |
|---|---|---|
| Furnace cycles on and off or won’t stay on | Overheating limit switch trip or restricted airflow | Check and replace dirty filters, clear obstructions, and ensure adequate airflow; reset and retry |
| Ignition fails after reset | Gas supply issue, faulty ignition, or dirty flame sensor | Verify gas valve is open, inspect ignition electrodes, clean flame sensor with a dry cloth, and retry reset |
| No ignition or intermittent ignition | Venting block, condensate safety switch, or electrical fault | Inspect venting pathway, ensure condensate trap is clear, and verify electrical connections |
| Indicator light shows a fault code after reset | Internal control fault or safety sensor trigger | Record the code and consult the manual or a technician for the exact meaning and service steps |
Safety Precautions Before Resetting
- Power down the furnace at the switch and the main breaker before handling any components.
- Do not reset if you smell gas or hear hissing sounds; evacuate and contact the gas utility or emergency services.
- Ensure the area is well‑ventilated and have a working carbon monoxide detector on the premises.
- Never bypass safety devices or screws; if you’re unsure about component condition, seek professional help.
- Keep children and pets away from the furnace during inspection and reset attempts.
Troubleshooting After Reset
- Verify thermostat settings: set to heat and ensure the target temperature is well above room temperature to trigger ignition.
- Listen for ignition sequence sounds; a brief click followed by burner ignition is typical. Persistent clicking without ignition indicates a ignition or gas supply issue.
- Check the air filter; a clogged filter restricts airflow and can cause overheating or cycling problems.
- Inspect the condensate safety switch and drainage line; water back‑up can trip safety controls and halt operation.
- Examine venting and exhaust pathways for blockages or restrictions that could trigger a fault.
- If a fault code remains after reset, note the code and consult the owner’s manual or contact a technician for diagnosis.
When To Call A Technician
- If there is a persistent smell of gas, CO alarms sounding, or any signs of a gas leak.
- If the furnace fails to ignite after multiple resets or shows repeated fault codes that you cannot resolve.
- If the unit is older and exhibits frequent cycling, unusual noises, or visible damage to wiring, venting, or the heat exchanger.
- If you cannot locate the reset button or the model does not appear to support a reset procedure.