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The Atwood furnace is a common propane heating solution for many RV owners. A reset switch is a safety feature designed to stop the furnace if ignition fails, the chamber overheats, or a fault is detected. Knowing how to locate, reset, and troubleshoot this switch can help maintain reliable heat while traveling. This guide explains what the reset switch does, where to find it on typical Atwood models, how to reset safely, and how to prevent frequent trips with practical maintenance tips.

What Is The Atwood Furnace Reset Switch

The reset switch on an Atwood RV furnace is a safety control that interrupts power to the furnace when a fault is detected, such as flame failure or overheating. After a fault, the switch can be reset to attempt another ignition once conditions are safe. It is not a substitute for professional service; repeated resets can indicate an underlying issue that requires inspection. The reset action should be brief and followed by monitoring the furnace as it attempts to relight.

Where To Find It And How It Looks

Locations vary slightly by model, but the reset switch is commonly a small recessed button or switch located inside the furnace cabinet, often behind the service panel or near the burner assembly. On some models, an exterior access panel may also expose a red reset button. To reach it safely, always disconnect power to the RV or switch off the shore power circuit, and consult the model’s manual for the exact location and labeling. Visual cues include a small red push button labeled “Reset” or a clearly marked red button on the control board.

Accessing the switch typically involves opening the front or interior service panel of the furnace. The area should be free of gas odors and debris before proceeding. If the button is not clearly visible, refer to the user guide or contact the manufacturer for model-specific directions. Do not force panels or reach into confined spaces without proper safety steps.

How To Reset Safely

Resetting the Atwood furnace should be done methodically to reduce the risk of fire or gas buildup. The following steps provide a generalized approach; always follow your model’s manual for any model-specific instructions.

• Ensure the area is safe: no propane odor, sparks, or visible damage. If you smell gas, evacuate and contact emergency services or the propane supplier.
• Power down the furnace: switch off the RV’s power at the breaker or disconnect the 12V supply and shut off the thermostat to stop calls for heat.
• Access the reset switch: locate the red reset button inside the furnace cabinet or as directed by the manual. If the switch is not easily accessible, do not force the panel.
• Reset: press and release the reset button (or hold for 1–2 seconds if the manual specifies). You may hear a click as it resets.
• Power up and test: restore power, set the thermostat to heat, and allow the furnace to attempt ignition. If ignition occurs, monitor operation for several minutes to ensure stable burner activity and fan operation.
• If the furnace does not restart or trips again: do not repeatedly press reset. There may be a fault that requires inspection, cleaning, or professional service.

Common Causes Of Reset Trips

Reset trips on Atwood furnaces are often caused by a combination of airflow, ignition, and gas supply issues. Understanding the likely culprits helps diagnose problems without unnecessary resets. Common causes include:

• Overheating due to restricted airflow. Blocked vents, dirty air filters, or poor combustion air can cause the furnace to overheat and shut down.
• Flame failure or ignition problems. Dirty burner heads, a dirty flame sensor, or a weak igniter can prevent proper ignition, triggering a reset.
• Gas supply irregularities. Low propane pressure, closed manual valve, or valve issues can prevent sustained flame.
• Vent or exhaust restrictions. Debris, bird nests, or snow can obstruct the vent, causing improper draft and shutdown.
• Electrical or control faults. Age-related wiring insulation degradation, low 12V supply, or faulty control board can lead to intermittent trips.

Troubleshooting Steps If It Keeps Tripping

If the Atwood furnace continues to trip after a reset, a structured approach helps identify the root cause without risking safety. Start with the simplest checks and progress to more involved diagnostics:

• Inspect and replace air filters. A clogged filter reduces airflow and can cause overheating.
• Check ventilation and exhaust paths. Remove any blockages from exterior vents, roof caps, and interior chase lines; clear spider webs or debris.
• Clean the burner and flame sensor. With power off, follow the manual to access the burner assembly and gently clean the flame sensor with a soft, non-abrasive cloth or swab; avoid bending the sensor.
• Test the propane supply. Ensure the propane tank is not empty, the main valve is open, and there are no leaks along the regulator or lines. A weak gas supply can cause ignition failure.
• Evaluate electrical connections. Look for corroded or loose wires at the control board and thermostat; damaged wiring may cause sporadic resets.
• Listen for unusual noises or smells. Any burning odor, buzzing, or crackling should prompt immediate shutdown and professional inspection.

If the problem persists after these steps, it is prudent to contact a qualified RV technician. Recurrent resets can indicate a safety hazard that requires a thorough inspection of the burner, venting system, electrical connections, and gas supply. Do not operate the furnace if there is any doubt about safe operation.

Maintenance To Prevent Tripping

Preventive maintenance reduces the likelihood of Reset trips and helps extend the life of the furnace. Regular, model-specific service is recommended, but general practices include:

• Schedule annual inspections. A certified technician can test the ignition, flame sensor, vent integrity, and overall system safety.
• Replace filters and clean compartments. Clean air filters and furnace enclosures to maintain proper airflow and combustion conditions.
• Keep vents clear. Ensure exterior vent caps are unobstructed by debris, snow, or vegetation.
• Inspect gas lines and connections. Periodic checks for leaks or corrosion help prevent ignition problems.
• Monitor battery and electrical supply. In RV installations, fluctuations in 12V and shore power can affect ignition modules; ensure stable power delivery.
• Document warning lights and codes. If the furnace shows error indicators, note them and reference the manual during service to expedite diagnosis.

When To Call A Technician

While many minor issues can be addressed by owners, certain situations require professional help. Reach out to an RV service technician if any of the following occur:

• Repeated resets without a reliable ignition. If the furnace cannot stay lit after several reset attempts, a fault in the ignition system or combustion chamber is likely.
• Gas smells or signs of a leak. Any propane odor or suspected leak is a safety emergency; evacuate and call emergency services or your gas supplier immediately.
• Electrical or control board concerns. Worn wiring, melted insulation, or unusual electrical behavior warrants professional inspection.
• Persistent overheating. If the system overheats even with clear airflow and clean components, a technical evaluation is needed to prevent fire risk.

Timely professional servicing can prevent costly damage and ensure safe operation, especially in enclosed RV environments where fires and gas hazards pose heightened risk.