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BCFurnace
3" HIGH LIMIT SWITCH L190-30F 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 L190-30F 3 High Limit Control Switches

BCFURNACE

543-018

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 L190-30F

1units 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 High Limit Switch is a critical safety component designed for modern HVAC systems and forced-air furnaces. Its primary function is to monitor the internal temperature of the heat exchanger or plenum, automatically cutting power to the heating source if temperatures exceed a safe operating threshold. Featuring a precision L190-30F thermal profile, the switch is engineered to open the circuit at 190 degrees Fahrenheit and reset once the temperature drops by 30 degrees. Replacing a malfunctioning or tripped high limit control is essential for preventing system overheating, protecting the heat exchanger from damage, and ensuring the safety of your home heating system. This durable, snap-action thermal sensor is a standard requirement for maintaining proper airflow and temperature regulation in residential and commercial heating units.

Specifications

Type
HVAC High Limit Control Switch
Size
3-inch insertion depth
Dimensions
3 in
Application
Forced-air furnaces, central heating systems, and HVAC air handlers designed to prevent system overheating.
Specifications
Opening Temperature: 190°F; Temperature Differential: 30°F; Switch Type: Normally Closed (NC); Reset Type: Automatic.

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Frequently Asked Questions

Is the 543-018 a genuine OEM part?
Yes, the 543-018 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 543-018 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-018) 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 543-018 shipped?
Most 3 Limit Switches including the 543-018 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 543-018 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 543-018 is in stock before visiting.

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