1-778-759-9864
United States (USD $) flagUnited States (USD $)
BCFurnace

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BCFURNACE

120-688

$143.00

+5% Tax • Shipping calculated at checkout.

U.S. Duties/Taxes, if applicable, may be due at time of delivery.

Name

TRANSFORMER,24V,24V/40VA,50/60HZ

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Not sure this fits your furnace? Call us — we're happy to help

Product Details

Description

This heavy-duty 24V transformer is an essential electrical component designed to provide reliable low-voltage power to heating and cooling systems. Serving as the primary power source for control circuits, this 40VA transformer steps down incoming line voltage to a safe 24-volt output required by thermostats, ignition modules, and furnace control boards. It is a common replacement part for HVAC systems experiencing issues with power delivery to the thermostat or failure of the contactor and relay switches. Built for efficiency and long-term durability, it supports both 50Hz and 60Hz frequencies, making it compatible with a wide range of residential and light commercial climate control equipment.

Specifications

Type
Electrical Transformer
Size
Standard 40VA
Application
Used in residential furnaces, central air conditioning units, heat pumps, and boiler systems to power low-voltage controls, thermostats, and relays.
Specifications
Secondary Voltage: 24V; Power Rating: 40VA; Frequency: 50/60Hz; Type: Class 2 Control Transformer

Not sure this is the right part?

Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.

1-778-759-9864

Mon–Sat 8AM–9PM PST · Or email parts@bcfurnace.com

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Frequently Asked Questions

Is the 120-688 a genuine OEM part?
Yes, the 120-688 is a genuine OEM replacement part manufactured by BCFurnace. 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.
How do I know if the 120-688 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (120-688) with your furnace model number. Visit the BCFurnace page on our site 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.
How fast can I get the 120-688 shipped?
Most electrical-transformers-relay including the 120-688 ship within 1–2 business days from our warehouse. We ship across Canada and the United States with tracking on every order. For urgent BCFurnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Can I pick up the 120-688 at your store?
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 120-688 is in stock before visiting.

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