1-778-759-9864
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BCFurnace
3" HIGH LIMIT SWITCH L280-40F 3 High Limit Control Switches 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

3" HIGH LIMIT SWITCH L280-40F 3 High Limit Control Switches

BCFURNACE

543-280

$51.00

+5% Tax • Shipping calculated at checkout.

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

Name

3" HIGH LIMIT SWITCH L280-40F

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Product Details

Description

Ensure the safety and efficiency of your heating system with this professional-grade 3-inch high limit switch. This essential HVAC safety component is designed to monitor the temperature within a furnace heat exchanger, providing critical protection against overheating. If the internal temperature reaches the maximum safety threshold, the switch automatically interrupts the heating circuit to prevent equipment damage and ensure safe home operation. Once the temperature cools by the specified differential, the switch resets, allowing for normal furnace function. This thermal limit control is a standard requirement for maintaining a reliable forced-air heating system and is a common replacement part for furnaces that are short-cycling or failing to stay lit due to thermal overload.

Specifications

Type
High Limit Control Switch
Size
3-inch insertion depth
Dimensions
3 in
Application
Used in residential forced-air furnaces, gas heaters, and electric heating systems to monitor plenum temperatures and prevent thermal overloads.
Specifications
Cutout Temperature: 280°F; Reset Differential: 40°F; Reset Temperature: 240°F; Switch Logic: Normally Closed (Opens on Temperature Rise); Reset Type: Automatic.

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Frequently Asked Questions

Is the 543-280 a genuine OEM part?
Yes, the 543-280 is a genuine OEM replacement part manufactured by BCFurnace. We source all 3 Limit Switches from authorized distributors to ensure exact-fit compatibility. This 3 Limit 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 543-280 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-280) 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 3 Limit 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 543-280 shipped?
Most 3 Limit Switches including the 543-280 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 543-280 at your store?
Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. 3 Limit Switches orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 543-280 is in stock before visiting.

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