1-778-759-9864
United States (USD $) flagUnited States (USD $)
BCFurnace
3" HIGH LIMIT SWITCH L170-30F 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 L170-30F 3 High Limit Control Switches

BCFURNACE

543-019

$51.00

+5% Tax • Shipping calculated at checkout.

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

Name

3" HIGH LIMIT SWITCH L170-30F

3units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Not sure this fits your furnace? Call us — we're happy to help

Product Details

Description

Ensure the safety and efficiency of your heating system with this premium 3-inch high limit control switch. Designed as a critical safety component for forced-air furnaces and HVAC units, this thermal sensor monitors the internal temperature of your appliance. If the system exceeds a safe operating threshold, the switch automatically breaks the electrical circuit to prevent overheating and potential damage to the heat exchanger. Once the temperature drops to a safe level, the automatic reset feature restores functionality. This durable high limit switch is an essential replacement part for maintaining proper airflow temperature and protecting your home's climate control system from thermal overload.

Specifications

Type
High Limit Control Switch
Size
3-inch insertion depth
Dimensions
3 in
Application
Forced-air furnaces, residential HVAC systems, air handlers, and gas or electric heating units.
Specifications
Trip Temperature: 170°F; Reset Differential: 30°F; Switch Type: Normally Closed (NC); Reset Type: Automatic; Mounting: Flange mount.

Not sure this is the right part?

Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.

1-778-759-9864

Mon–Sat 8AM–9PM PST · Or email parts@bcfurnace.com

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Frequently Asked Questions

Is the 543-019 a genuine OEM part?
Yes, the 543-019 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 543-019 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-019) 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 543-019 shipped?
Most 3 Limit Switches including the 543-019 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 543-019 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 543-019 is in stock before visiting.

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