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BCFurnace
3" HIGH LIMIT SWITCH L170-20F 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 L170-20F 3 High Limit Control Switches

BCFURNACE

543-041

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 L170-20F

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

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Fast Delivery
Local Pickup

Product Details

Description

The 3" High Limit Switch L170-20F is a vital safety component designed for residential gas furnaces and HVAC heating systems. This high-limit control switch acts as a thermal safeguard by monitoring the temperature within the heat exchanger. Specifically engineered to prevent overheating, the switch is set to automatically trip and break the electrical circuit if internal temperatures reach 170 degrees Fahrenheit. Once the unit cools down by 20 degrees, the switch resets, ensuring your heating equipment operates within safe thermal parameters. A malfunctioning limit switch can cause a furnace to cycle incorrectly or shut down entirely, making this replacement part essential for restoring reliable and safe heating performance.

Specifications

Type
High Limit Control Switch
Size
3-inch probe length
Dimensions
3 inches
Application
Used in forced-air gas furnaces and residential heating units to provide over-temperature protection and safety circuit management.
Specifications
Temperature Rating: Opens at 170°F (L170); Reset Differential: Closes at 150°F (20°F below opening point); Switch Type: Normally Closed, Opens on Temperature Rise.

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Frequently Asked Questions

Is the 543-041 a genuine OEM part?
Yes, the 543-041 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 543-041 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-041) 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 543-041 shipped?
Most 3 Limit Switches including the 543-041 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 543-041 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 543-041 is in stock before visiting.

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