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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-performance 18-inch thermocouple is a critical safety component for gas-fired heating appliances. Designed to generate a 30 millivolt (30mV) electrical signal when heated by a pilot flame, it serves as the primary sensor for maintaining safe gas valve operation. If the pilot light goes out, the thermocouple cools rapidly, triggering the gas valve to close and preventing fuel leaks. Built for durability and quick response times, this thermocouple is suitable for a wide range of residential and commercial heating systems, including furnaces, boilers, and water heaters. Its standard design allows for easy integration into existing pilot burner assemblies, making it an essential replacement part for restoring the safety and efficiency of your gas appliance.
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
Yes. The 745-031 is a genuine Lennox OEM part, sourced from an authorized Lennox parts distributor. This Thermocouple 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 (745-031) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible Thermocouples, Pilot Assembly, Pilot Tubing for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most Thermocouples, Pilot Assembly, Pilot Tubing including the 745-031 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. Thermocouples, Pilot Assembly, Pilot Tubing orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 745-031 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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