R45694-008 LENNOX ARMSTRONG DUCANE PRESSURE SWITCH -0.45" WC, 773-425
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Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours
Not sure this fits your furnace? Call us — we're happy to help
This high-performance air pressure switch is a vital safety component for residential gas furnaces and heating systems. Designed to act as an air-proving sensor, it ensures the inducer blower motor is creating the necessary draft to safely exhaust combustion gases before the ignition process begins. If your heating system is failing to ignite or experiences intermittent shutdowns, this pressure switch serves as a reliable replacement to restore proper furnace operation. Engineered for precision, it monitors specific vacuum levels within the combustion chamber, preventing the system from operating under unsafe venting conditions. Ideal for HVAC technicians and homeowners looking for dependable repair parts to maintain furnace efficiency and safety.
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 773-425 is a genuine OEM, or a factory replacement manufacturer approved part. We source all Air Pressure Switches from authorized distributors to ensure exact-fit compatibility. 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 (773-425) 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 773-425 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 773-425 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.
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