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BCFurnace
3" HIGH LIMIT SWITCH L145-20F 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 L145-20F 3 High Limit Control Switches

BCFURNACE

543-047

CA$68.33

+5% Tax • Shipping calculated at checkout.

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

Name

3" HIGH LIMIT SWITCH L145-20F

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 vital safety component designed for residential and commercial heating systems. Functioning as a thermal safeguard, this furnace limit control monitors internal temperatures to prevent overheating. If the heat exchanger reaches a critical temperature, the switch automatically breaks the electrical circuit to the gas valve or heating element, protecting your HVAC equipment from damage and ensuring home safety. Featuring a fixed temperature setting of 145°F with a 20°F differential, this sensor ensures reliable operation and resets once the system has cooled to a safe level. It is a common replacement part for forced-air furnaces and air handlers experiencing frequent cycling or safety lockout issues.

Specifications

Type
HVAC High Limit Control Switch
Size
3-inch insertion depth
Dimensions
3 inches
Application
Used in gas furnaces, electric furnaces, and air handlers as a primary safety over-temperature cutout.
Specifications
Trip Temperature: 145°F (Normally Closed); Reset Differential: 20°F; Switch Type: L-Task limit control

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Frequently Asked Questions

Is the 543-047 a genuine OEM part?
Yes, the 543-047 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 543-047 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (543-047) 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 543-047 shipped?
Most 3 Limit Switches including the 543-047 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 543-047 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 543-047 is in stock before visiting.

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