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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 high-limit control switch is a vital safety component for residential and commercial heating systems, including furnaces and HVAC units. Designed as a normally closed (NC), Single Pole Single Throw (SPST) device, it acts as a thermal safeguard by monitoring internal temperatures. The switch is engineered to open the electrical circuit if the temperature reaches 170°F, preventing potential overheating and equipment damage. With its 20°F differential auto-reset feature, the switch automatically closes once temperatures return to a safe operating range. The 3-inch insert probe allows for precise temperature detection within the plenum or heat exchanger. This replacement limit switch is essential for maintaining the safety and efficiency of forced-air heating applications.
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 100-227 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 (100-227) 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 100-227 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 100-227 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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