+5% Tax • Shipping calculated at checkout.
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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
Ensure your heating system operates safely and efficiently with this professional-grade high limit control switch. Designed as a critical safety component for forced-air furnaces and HVAC units, this thermal sensor monitors the temperature of the heat exchanger to prevent overheating. It is engineered to automatically interrupt the electrical circuit if internal temperatures exceed the safe operating threshold, protecting your equipment from damage and ensuring home safety. Once the system cools by a specific temperature differential, the switch resets to allow for normal operation. This reliable replacement part is essential for troubleshooting furnace short-cycling or thermal cutout issues, providing long-lasting durability for seasonal maintenance and repairs.
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 543-006 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 (543-006) 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 543-006 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 543-006 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.
161 more not shown. Check your own model number above.
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