1-778-759-9864
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BCFurnace
2" HIGH LIMIT SWITCH L170-40F 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

2" HIGH LIMIT SWITCH L170-40F 3 High Limit Control Switches

BCFURNACE

543-031

CA$58.23

+5% Tax • Shipping calculated at checkout.

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

Name

2" HIGH LIMIT SWITCH L170-40F

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 your heating system operates safely and efficiently with this high-quality 2-inch high limit switch. Designed as a critical safety component for residential furnaces and HVAC units, this thermal limit control prevents the heat exchanger from overheating by automatically interrupting the electrical circuit when internal temperatures exceed safe limits. It also plays a vital role in regulating blower motor operation, ensuring the fan continues to run until the unit has cooled sufficiently. This L170-40F switch is a common replacement part for heating systems experiencing short-cycling or continuous fan operation. By maintaining precise thermal thresholds, it helps extend the lifespan of your heating equipment and protects your home from potential hazards. Perfect for HVAC maintenance, repairs, and ensuring reliable performance during cold weather months.

Specifications

Type
High Limit Control Switch
Size
2-inch probe depth
Dimensions
2 in
Application
Used in forced-air furnaces, HVAC systems, and heating units to monitor heat exchanger temperatures and control blower fan cycling.
Specifications
Temperature Rating: L170-40F (Opens at 170°F, 40°F differential/resets at 130°F); Sensor Type: Bi-metal disc; Mounting Style: Flange-mount.

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Frequently Asked Questions

Is the 543-031 a genuine OEM part?
Yes, the 543-031 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 543-031 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-031) 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 543-031 shipped?
Most 3 Limit Switches including the 543-031 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 543-031 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 543-031 is in stock before visiting.

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