1-778-759-9864
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BCFurnace

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BCFURNACE

021-872

$96.00

+5% Tax • Shipping calculated at checkout.

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

Name

SWITCH, AIR FLOW

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 high-quality Air Flow Switch is an essential safety component for HVAC systems, furnaces, and industrial air handling units. Also known as an air pressure switch or air proving switch, this part monitors the differential pressure within the ventilation system to ensure the blower motor is moving sufficient air before allowing the heating cycle to engage. By verifying airflow, it prevents overheating and equipment damage, acting as a critical failsafe for your appliance. If your heating system is failing to ignite or shutting down unexpectedly, this air pressure sensor is a common replacement part to restore safe and efficient operation. Designed for precision and durability, it helps maintain optimal climate control and indoor air quality.

Specifications

Type
Air Pressure Switch
Size
Compact
Application
Commonly used in residential and commercial HVAC units, furnaces, air handlers, and ventilation systems to prove airflow before system ignition.
Specifications
Differential pressure sensing; safety interlock functionality; diaphragm-actuated mechanical switch.

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 021-872 a genuine OEM part?
Yes, the 021-872 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 021-872 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (021-872) 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 021-872 shipped?
Most Air Pressure Switches including the 021-872 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 021-872 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 021-872 is in stock before visiting.

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