Carrier is a division of the United Technologies Company that produces heating and cooling equipment for residential and commercial customers. Carrier gas furnaces use a safety component known as a flame roll-out switch to shut down the appliance when it overheats. If your Carrier furnace turns off unexpectedly, knowing the location of the flame roll-out switch can come in handy. Fortunately, finding the flame roll-out switch on a Carrier furnace takes just seconds.
Safety First
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Troubleshooting or repairing a major household appliance, such as a furnace, can be dangerous if the proper safety precautions are not taken. Serious injury or death can occur if repairs are performed while the furnace is connected to electrical and gas supplies. Find the circuit breaker switch that corresponds to your Carrier furnace; flip the switch to the "Off" position to disrupt the electrical supply to the appliance. Disrupt the gas supply by turning the supply valve to the "Off/Closed" position. You can restore the electricity and gas to the furnace when you've completed your troubleshooting or repairs.
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Upflow Furnace
A Carrier upflow furnace takes in cool air from the bottom of the appliance and expels the warmed air through the top. In upflow models, the top access panel on the front of the furnace shields the burner components, while the bottom panel provides access to the blower components. Remove the burner access panel; pull the panel up and toward you to clear the tabs that hold the panel in place. The burner assembly is mounted to the top of the furnace cabinet. Find the flame roll-out switch on the right side of the burner assembly housing.
Downflow Furnace
A Carrier downflow furnace takes in cool air at the top and forces the warmed air out through the bottom of the appliance. The positioning of the components in downflow models are reversed in comparison to their positioning in upflow furnaces. To access the burner components in a downflow furnace, you'll need to remove the bottom front panel. Pull the panel up and toward you to free it. In Carrier downflow furnace models, the flame roll-out switch is just above the gas burner.
Flame Roll-Out Switch Reset
The flame roll-out switch activates when the furnace heats to a predetermined high temperature limit. Once the flame roll-out switch has been tripped, it must be reset before the appliance can produce heat again. Wait 30 minutes before attempting a furnace reset to allow the motor to cool down. Press and release the raised red button at the center of the flame roll-out switch to reset the furnace. You can press the reset button up to three times before troubleshooting the furnace's internal components or calling for repair service; allow 30 minutes between each reset.