Crankcase Heaters

About Crankcase Heaters

Keep Compressors Protected with Crankcase Heaters

Crankcase heaters are essential components in HVAC systems, preventing refrigerant migration and protecting compressors from damage during cold weather and off-cycles. At Voomi Supply, we offer a wide range of crankcase heaters engineered to maintain oil integrity and system longevity—helping you avoid costly repairs and extend the life of your HVAC equipment.

Whether you're maintaining a rooftop unit, replacing parts in a split system, or outfitting new equipment, our selection is built to meet the needs of residential, commercial, and industrial systems.

What Does a Crankcase Heater Do?

When a compressor shuts off, refrigerant can migrate and condense in the crankcase. Upon startup, this can cause the refrigerant to mix with oil, leading to foaming, poor lubrication, and potential mechanical failure. A crankcase heater solves this problem by keeping the oil warm and vaporizing any liquid refrigerant before it becomes an issue.

Used widely in both air conditioning and refrigeration systems, crankcase heaters are especially critical in colder climates or systems with long off-cycles.

Trusted Brands and Proven Performance

At Voomi Supply, we source crankcase heaters from the industry’s most respected manufacturers, including names like Copeland, Emerson, Packard, and DiversiTech. These heaters are available in various wattages, voltages, and wrap styles to suit scroll, reciprocating, and rotary compressors across leading HVAC brands.

Whether you're working with equipment from Trane, Carrier, Rheem, or Lennox, our inventory includes compatible options backed by technical specs and support.

Easy Installation and Compatibility

Our crankcase heaters are available in strap-on and insertion styles for fast installation. Most options feature durable stainless-steel construction, fiberglass insulation, and built-in leads that make it easy to connect directly to the compressor terminal or contactor circuit.

With product filters for diameter, voltage, and wattage, you can quickly find heaters to match your system’s exact needs. From 120V and 240V models to universal-fit wrap-around styles, we make it easy to keep your inventory moving and your installs on schedule.

Applications Across Residential and Commercial HVAC

Crankcase heaters are used in everything from residential heat pumps to rooftop packaged units, walk-in coolers, chillers, and commercial condensing units. They're a small investment that prevents major compressor failure—making them a must-have component for contractors, facility maintenance teams, and system designers alike.

Our heaters are suitable for both OEM replacements and aftermarket upgrades, with technical data and diagrams available to ensure correct fitment.

Why Buy Crankcase Heaters from Voomi Supply?

We make it easy to source heating and cooling components with real-time inventory updates, technical support, and lightning-fast shipping. With over a million HVAC products and strong partnerships with leading suppliers, we help professionals get what they need—when they need it.

Need help choosing the right crankcase heater? Our support team is available to assist with sizing, compatibility, and troubleshooting guidance.