+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
This high-performance Ignition Modulating Control Board serves as the central processing interface for advanced HVAC systems and furnaces. Designed to manage complex ignition sequences and burner modulation, this circuit board ensures your heating system operates with maximum efficiency and precision. It coordinates critical signals between the thermostat and the heating components to maintain steady indoor temperatures while monitoring flame sensors for safety. If your furnace is experiencing ignition failure, inconsistent heating, or short-cycling, this control module is a reliable replacement to restore proper functionality. Built with professional-grade circuitry, it is engineered to handle the thermal and electrical demands of modern high-efficiency climate control equipment, providing a seamless interface for system diagnostics and performance optimization.
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 121-908 is a replacement part. Match your furnace model number on our site to confirm the fit. This Control Board 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 (121-908) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible Control Boards for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most Control Boards including the 121-908 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. Control Boards orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 121-908 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.
488 more not shown. Check your own model number above.
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