CA
Switch, Blower Door Blower Motors, Fan, Run Capacitors
+5% Tax • Shipping calculated at checkout.
U.S. Duties/Taxes, if applicable, may be due at time of delivery.
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-quality Blower Door Switch is a vital safety component designed for modern HVAC systems, including high-efficiency furnaces and air handlers. Functioning as a safety interlock, this switch ensures that power is cut to the blower motor and internal electrical components whenever the blower compartment door is removed or not fully seated. This prevents accidental contact with moving fan blades or high-voltage parts during maintenance. If your furnace or air handler fails to start despite proper thermostat settings, a faulty or damaged door switch is a common culprit. Replacing a worn interlock switch is essential for maintaining the safe and reliable operation of your home's heating and cooling system.
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–9PM PST · Or email parts@bcfurnace.com
Compatible parts and related replacements
Yes, the 040-439 is a genuine OEM, or a factory replacement manufacturer approved part. We source all Blower Motors & Capacitors from authorized distributors to ensure exact-fit compatibility. This Blower Motors & Capacitor 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 (040-439) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible Blower Motors & Capacitors for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most Blower Motors & Capacitors including the 040-439 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. Blower Motors & Capacitors orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 040-439 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.
382 more not shown. Check your own model number above.
Looking for more Blower Motors & Capacitors?
