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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
This high-quality Air Pressure Switch is a vital safety component for residential gas furnaces and HVAC systems. Calibrated to a precise 0.85" WC (Water Column) set point, this air proving switch monitors the draft inducer motor's performance to ensure proper airflow is established before the heating cycle begins. If your furnace is cycling incorrectly, failing to ignite, or displaying pressure switch lockout codes, this reliable replacement part can restore your system to peak performance. Designed for durability and precision, it acts as a critical fail-safe, preventing the burner from igniting if venting or combustion air is insufficient, thereby protecting your home and heating equipment.
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
Yes. The 773-248 is a genuine Lennox OEM part, sourced from an authorized Lennox parts distributor. 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 (773-248) 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 773-248 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 773-248 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.
76 more not shown. Check your own model number above.
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