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BCFurnace
LENNOX PRESSURE SWITCH SINGLE PORT 0.43" WC SPST Air Pressure Switch, Air Proving furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

LENNOX PRESSURE SWITCH SINGLE PORT 0.43" WC SPST Air Pressure Switch, Air Proving

BCFURNACE

773-335

CA$68.07

+5% Tax • Shipping calculated at checkout.

U.S. Duties/Taxes, if applicable, may be due at time of delivery.

Name

LENNOX PRESSURE SWITCH SINGLE PORT 0.43" WC SPST

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

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Not sure this fits your furnace? Call us — we're happy to help

Product Details

Description

This premium Lennox pressure switch is a vital safety component for residential and commercial HVAC systems. As a single-port air proving switch, it plays a crucial role in the furnace ignition sequence by monitoring the pressure differential created by the draft inducer motor. With a precision-calibrated 0.43" WC (Water Column) set point, this SPST (Single Pole Single Throw) switch ensures that flue gases are being properly vented before the burner is allowed to ignite. If your heating system is experiencing ignition failure or displaying pressure switch error codes, this replacement part is essential for restoring safe and efficient furnace operation. Designed for durability and precision, it serves as a reliable solution for heating system repairs and routine maintenance.

Specifications

Type
Air Pressure Switch
Size
Standard HVAC Component
Application
Used in forced-air furnaces and HVAC heating units as a safety sensor to prove airflow and vent pressure before ignition.
Specifications
Single Port, 0.43" WC Set Point, SPST (Single Pole Single Throw) Switch Configuration

Not sure this is the right part?

Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.

1-778-759-9864

Mon–Sat 8AM–9PM PST · Or email parts@bcfurnace.com

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Frequently Asked Questions

Is the 773-335 a genuine OEM part?
Yes, the 773-335 is a genuine OEM replacement part manufactured by BCFurnace. We source all Air Pressure Switches from authorized distributors to ensure exact-fit compatibility. This Air Pressure Switches is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
How do I know if the 773-335 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (773-335) with your furnace model number. Visit the BCFurnace page on our site 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.
How fast can I get the 773-335 shipped?
Most Air Pressure Switches including the 773-335 ship within 1–2 business days from our warehouse. We ship across Canada and the United States with tracking on every order. For urgent BCFurnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Can I pick up the 773-335 at your store?
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 773-335 is in stock before visiting.

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