120V 24V TRANSFORMER Electrical, Transformers, Relay
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Not sure this fits your furnace? Call us — we're happy to help
This heavy-duty 120V to 24V step-down transformer is a critical electrical component designed to provide consistent, low-voltage power to HVAC and appliance control circuits. By efficiently converting standard 120-volt household current into the 24-volt power required by thermostats, relays, and integrated circuit boards, this transformer ensures the safe and reliable operation of your heating and cooling systems. It is a common replacement part for furnace and air handler repairs when the system fails to trigger the ignition or cooling cycle due to power supply issues. Engineered for durability and high thermal resistance, this transformer helps restore proper communication between your appliance's control interface and its mechanical hardware.
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 872-008 is a genuine OEM, or a factory replacement manufacturer approved part. We source all electrical-transformers-relay from authorized distributors to ensure exact-fit compatibility. This electrical-transformers-relay 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 (872-008) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible electrical-transformers-relay for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most electrical-transformers-relay including the 872-008 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. electrical-transformers-relay orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 872-008 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.
Many more not shown. Check your own model number above.
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