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Furnace – Pressure Switch | Repair and Replace

In this episode of Repair and Replace, Vance shows how to replace the pressure switch, which is part of troubleshooting a furnace that won't ignite. The draft inducer fan pulls air into the burner. The pressure switch monitors the airflow and will shut the furnace off if the pressure is too low for combustion. If the pressure switch is fails, or if the pressure switch remains open, then the furnace might cycle on and off and will not function properly.

Buy pressure switches online:

Learn how a furnace works:

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

More furnace repairs:


00:00 Intro
00:22 How it Works
00:50 What You'll Need
01:07 Step 1: Disconnect The Furnace
01:28 Step 2: Remove the Pressure Switch
02:11 Step 3: 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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