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BCFurnace
3" HIGH LIMIT SWITCH L150-30F 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 L150-30F 3 High Limit Control Switches

BCFURNACE

543-021

CA$68.83

+5% Tax • Shipping calculated at checkout.

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

Name

3" HIGH LIMIT SWITCH L150-30F

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Product Details

Description

The 3" High Limit Switch L150-30F is a vital safety control component used in residential and commercial heating systems. Designed to monitor internal temperatures, this thermal limit switch acts as a failsafe by automatically interrupting the electrical circuit if the furnace or air handler exceeds its safe operating limit of 150°F. This prevents overheating, protects the heat exchanger, and ensures the overall safety of your HVAC system. Once the internal temperature cools down by a 30°F differential, the switch automatically resets to restore normal operation. Ideal for repair and maintenance of forced-air furnaces, this high-quality replacement switch ensures reliable performance, consistent temperature regulation, and longevity for your heating equipment.

Specifications

Type
High Limit Control Switch
Size
3-inch profile
Dimensions
3 inches
Application
Used in forced-air furnaces, gas heating units, and HVAC air handlers to provide over-temperature protection and system safety.
Specifications
Opening Temperature: 150°F; Reset Differential: 30°F (Closes at 120°F); Reset Type: Automatic; Contact Configuration: Normally Closed (NC).

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Frequently Asked Questions

Is the 543-021 a genuine OEM part?
Yes, the 543-021 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 543-021 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-021) 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 543-021 shipped?
Most 3 Limit Switches including the 543-021 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 543-021 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 543-021 is in stock before visiting.

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