How to Reset the Flame Rollout Switch on a Carrier Furnace

Resetting the flame rollout switch on a Carrier furnace is a critical task that can be necessary when your furnace has experienced a flame rollout. A flame rollout is a dangerous condition where flames and heat escape from the furnace’s main combustion area, potentially causing damage or a fire hazard. The flame rollout switch is a safety device designed to detect this issue and shut down the furnace to prevent damage or hazards. Here’s a guide on how to safely reset this switch.

Understanding the Flame Rollout Switch

The flame rollout switch is a temperature-sensitive safety device located near the burners of your Carrier furnace. It is designed to detect unusually high temperatures outside the combustion chamber and shut down the furnace if a rollout occurs.

Step 1: Ensure Safety First

Before attempting to reset the flame rollout switch, turn off the power to your furnace. This can be done at the furnace switch or your home’s main circuit breaker.

Step 2: Locate the Flame Rollout Switch

The flame rollout switch is typically located near the furnace burners. It’s a small, metallic disc-shaped device with two wires attached to it and a small button or protrusion in the center.

Step 3: Inspect for Signs of a Rollout

Before you reset the switch, inspect the area around the burners for signs of soot, which can indicate a flame rollout has occurred. If you find soot or other signs of burning outside the combustion chamber, it’s important to address this issue before resetting the switch.

Step 4: Reset the Switch

To reset the flame rollout switch, press the small button or protrusion in the center of the switch. If the switch has tripped due to high temperatures, this action should reset it.

Step 5: Restore Power and Test

After resetting the switch, turn the power back on to your furnace. Monitor the furnace as it starts to ensure it is operating correctly and that there is no sign of a flame rollout occurring again.

Important Considerations

  • Repeat Tripping: If the flame rollout switch trips again soon after resetting, it indicates a more serious issue that needs professional attention.
  • Potential Causes: Frequent tripping can be caused by restricted airflow, a blocked flue, a malfunctioning burner, or other serious issues.
  • Seek Professional Help: If you are unsure about any steps, if you observe signs of a flame rollout, or if the switch keeps tripping, contact a qualified HVAC technician for a thorough inspection and repair.


Resetting the flame rollout switch on your Carrier furnace can be straightforward, but understanding the reasons behind a rollout is crucial. This switch is a key safety feature, and its tripping is often a symptom of a deeper issue. Regular maintenance and prompt attention to any furnace problems are essential for safe and efficient operation. If in doubt, always consult with a professional to ensure your furnace runs safely and optimally.

Swift Taylor
Swift Taylor
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