How To Test Flame Rollout Switch

Flame rollout switches are safety devices found in many gas appliances. They work by detecting the presence of a flame and shutting off the flow of gas if the flame is too high. To test a flame rollout switch, light the appliance and hold a piece of paper near the flame. The paper should start to brown and curl within about half an inch of the flame. If it does, the flame rollout switch is working properly. If not, the switch may need to be replaced.

How To Test Flame Rollout Switch

A flame rollout switch is a safety device used to detect when a fire has started and to automatically shut off the fuel supply to the furnace. The switch is located in the duct work near the furnace and is activated by heat. When the switch senses heat, it sends a signal to the furnace to turn off the gas. To test a flame rollout switch, you will need a screwdriver, a flashlight, and a piece of wire. First, turn off the power to the furnace

below -A multimeter -A lighter or torch -A working fire extinguisher

  • Check for continuity between terminals of flame rollout switch
  • Check voltage at flame rollout switch
  • Flame rollout switch is located in the electrical panel
  • Check that breaker for the furnace is on

-Check that the switch is in the off position before testing. -Make sure there is no fuel source near the area where you will be testing. -Ensure that there is plenty of ventilation in the area. -Test the switch in a safe area, away from flammable materials. -Make sure to have a fire extinguisher nearby in case of an emergency.

Frequently Asked Questions

How Do I Test A Roll Out Switch?

Testing a roll out switch is fairly easy. First, make sure the switch is in the off position. Next, turn the switch to the on position and check to see if the light turns on. If the light does not turn on, then there may be a problem with the switch. If the light turns on, then test to see if the switch is working properly by turning it off and then back on again.

How Do You Know If A Roll Out Switch Is Bad?

If a roll out switch is bad, it will not reset and the breaker will trip.

Can I Bypass The Flame Rollout Switch?

Yes, you can bypass the flame rollout switch by using a jumper wire.


A flame rollout switch is a critical safety feature of a furnace, and should be tested annually. The test is simple: set the thermostat to the lowest possible setting and wait for the furnace to turn on. Then, hold a lit match or lighter up to the switch. If the flame rollout switch shuts off the furnace, it is working properly.

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