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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
This 3-inch high limit switch is an essential safety control designed for gas-fired furnaces and heating systems. Acting as a critical thermal safeguard, this sensor monitors the air temperature within the heat exchanger. If the system reaches an unsafe operating temperature, the switch automatically interrupts power to the heating circuit, preventing overheating and protecting your HVAC equipment from potential damage. This limit control is engineered to open the circuit at a fixed temperature of 200°F and features a 30°F differential, allowing the system to reset once it has cooled to a safe level. It is a vital replacement part for maintaining the safety and efficiency of residential and commercial forced-air heating units during the winter months.
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 543-007 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 (543-007) 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 543-007 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 543-007 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.
646 more not shown. Check your own model number above.
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