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Pickup available at 75 Blue Mountain St #3, Coquitlam
Usually ready in 24 hours
Not sure this fits your furnace? Call us — we're happy to help
The 3-inch High Limit Switch (L200-20F) is a vital safety component designed for residential and commercial HVAC heating systems. This thermal limit control acts as a protective sensor, monitoring the temperature within the furnace heat exchanger. It is engineered to automatically interrupt the electrical circuit and shut down the burner if the internal temperature exceeds a safe threshold of 200°F, preventing potential damage to the unit and ensuring home safety. Featuring a 20°F differential, the switch resets once the system cools to 180°F. If your furnace is short-cycling or the blower motor continues to run without heat, this high-quality replacement limit switch is a primary troubleshooting component for restoring reliable performance and overheating protection.
Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.
1-778-759-9864Mon–Sat 8AM–5PM PT · Or email parts@bcfurnace.com
Compatible parts and related replacements
The 543-046 is a replacement part. Match your furnace model number on our site to confirm the fit. This 3 Limit Switch is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
The easiest way is to match the part number (543-046) with your furnace model number. Visit the homepage 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.
Most 3 Limit Switches including the 543-046 ship within 1–2 business days from our warehouse. We ship across Canada and the United States, and worldwide, with tracking on every order. For urgent furnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
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 543-046 is in stock before visiting.
Still not sure this is the right part? Call 1-778-759-9864 and we will check your model number with you.
The model number is on the rating plate inside the furnace door.
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