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Pickup available at 75 Blue Mountain St #3, Coquitlam
Usually ready in 24 hours
Not sure this fits your furnace? Call us — we're happy to help
Ensure your heating system operates safely and efficiently with this genuine-style replacement air pressure switch for gas furnaces. Designed specifically for HVAC systems requiring a 0.35" WC (Water Column) set point, this air proving switch acts as a vital safety sensor. It monitors the vacuum pressure created by the inducer motor to verify proper airflow and flue venting before allowing the ignition process to begin. If your furnace is cycling incorrectly or failing to ignite due to pressure-related error codes, replacing a faulty switch is essential for restoring reliable heat. Built for durability and precise calibration, this component helps maintain optimal combustion and prevents hazardous conditions in residential heating units.
Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.
1-778-759-9864Mon–Sat 8AM–5PM PT · Or email parts@bcfurnace.com
Compatible parts and related replacements
The 773-237 is a replacement part. Match your furnace model number on our site to confirm the fit. This Air Pressure Switch is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
The easiest way is to match the part number (773-237) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible Air Pressure Switches for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most Air Pressure Switches including the 773-237 ship within 1–2 business days from our warehouse. We ship across Canada and the United States, and worldwide, with tracking on every order. For urgent furnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. Air Pressure Switches orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 773-237 is in stock before visiting.
Still not sure this is the right part? Call 1-778-759-9864 and we will check your model number with you.
The model number is on the rating plate inside the furnace door.
9 more not shown. Check your own model number above.
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