1-778-759-9864
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BCFurnace
3" CAMSTAT FIXED LIMIT SWITCH L120-30F (AUTO RESET) 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" CAMSTAT FIXED LIMIT SWITCH L120-30F (AUTO RESET) 3 High Limit Control Switches

BCFURNACE

543-502

CA$98.85

+5% Tax • Shipping calculated at checkout.

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

Name

3" CAMSTAT FIXED LIMIT SWITCH L120-30F (AUTO RESET)

2units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Product Details

Description

This 3-inch fixed high limit control switch is a critical safety component designed for HVAC systems and forced-air furnaces. Engineered to monitor internal temperatures, this thermal limit switch prevents equipment overheating by automatically breaking the electrical circuit when the temperature reaches 120°F. The built-in auto-reset feature ensures the switch closes again once the system cools down by 30°F, allowing for seamless operation without manual resetting. This durable replacement part is essential for maintaining the safety and efficiency of residential and commercial heating units, providing reliable thermal protection against restricted airflow or blower failure.

Specifications

Type
High Limit Control Switch
Size
3-inch probe depth
Dimensions
3 in
Application
Used as a safety cutout in furnaces, heaters, and HVAC air handling units to prevent heat exchanger damage and ensure safe operating temperatures.
Specifications
Fixed temperature setting: Opens at 120°F; 30°F differential (Resets at 90°F); Automatic reset functionality; 3-inch insertion probe.

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Frequently Asked Questions

Is the 543-502 a genuine OEM part?
Yes, the 543-502 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 543-502 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-502) 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 543-502 shipped?
Most 3 Limit Switches including the 543-502 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 543-502 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 543-502 is in stock before visiting.

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