1-778-759-9864
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BCFurnace
3" HIGH LIMIT SWITCH L140-30F 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 L140-30F 3 High Limit Control Switches

BCFURNACE

543-056

CA$153.54

+5% Tax • Shipping calculated at checkout.

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

Name

3" HIGH LIMIT SWITCH L140-30F

3units 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 premium 3-inch High Limit Switch (L140-30F). Designed as a vital safety cut-out for gas furnaces and HVAC units, this limit control prevents overheating by monitoring the temperature within the heat exchanger. If the air temperature reaches the 140°F threshold, the switch automatically breaks the electrical circuit to shut down the burner, protecting your appliance from damage and ensuring home safety. Featuring a 30°F differential, it automatically resets once the system cools to a safe operating temperature. This reliable replacement part is essential for resolving common furnace issues such as short-cycling or the blower motor running continuously due to a tripped limit sensor.

Specifications

Type
High Limit Control Switch
Size
3-inch probe depth
Dimensions
3 in
Application
Forced-air gas furnaces and HVAC heating systems requiring a fixed temperature limit control.
Specifications
Opening Temperature: 140°F; Temperature Differential: 30°F (Resets at 110°F); Normally Closed (NC) circuit configuration; 3-inch insertion depth.

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Frequently Asked Questions

Is the 543-056 a genuine OEM part?
Yes, the 543-056 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 543-056 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-056) 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 543-056 shipped?
Most 3 Limit Switches including the 543-056 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 543-056 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 543-056 is in stock before visiting.

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