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Furnace – Flame Roll-Out Switch | Repair and Replace

In this episode of Repair and Replace, Vance shows how to replace the flame roll-out switch in a gas furnace. The flame roll-out switch is a safety switch that shuts the furnace off if flames come out the front of the furnace. If flames roll-out the front of the burner, its a strong sign that the heat exchanger is cracked, and could be leaking carbon monoxide. If the flame roll-out switch fails then the furnace might cycle on and off and will not function properly. The flame roll-out switch can be tested before replacing.

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Learn how a furnace works:

If your furnace isn't working, then watch our troubleshooting guide:

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00:00 Intro
00:22 How it Works
00:49 What You'll Need
01:07 Step 1: Remove the Screen
01:27 Step 2: Remove the Switch
01:52 Step 3: Test the Switch
02:20 Step 4: Replace the Switch
02:37 Step 5: Reconnect the Furnace


AMRE Supply provides homeowners, service contractors, and property management with the parts and knowledge needed to get the best performance out of any property. Stocking the largest selection of appliance parts, heating, plumbing, lighting, and janitorial supplies, AMRE ships almost anywhere in Canada within 24 - 48 hours. Expert help is available online, over the phone or in person at one of the many locations across Canada.

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