Carrier HT31AZ241 Crankcase Heater

The Carrier HT31AZ241 Crankcase Heater is a critical OEM replacement part designed for insertion type applications in high-capacity compressor systems. Operating at 240 Volts and delivering 200 Watts of heating power, this immersion-style heater is specifically engineered to fit Carrier 5H series compressors, including the 5H40 and 5H46 models. By maintaining the oil at an optimal temperature during off-cycles, it effectively prevents refrigerant migration and subsequent oil dilution. This ensures that the compressor starts with high-viscosity lubrication, protecting internal bearings and valves from premature wear caused by slugging.

Constructed with a 7-inch sheath for deep insertion and 63-inch leads for flexible routing to the contactor, the HT31AZ241 is built for the rigors of commercial HVAC/R units. It is a direct fit for various commercial hvac systems where precise thermal management of the crankcase is non-negotiable for system longevity. Service technicians should verify the specific insertion type requirements of the 5H open-drive or semi-hermetic compressor before installation to ensure a secure, seated seal within the heater well.

• Prevents refrigerant migration to the oil during extended off-cycles in cold environments.
• Reduces the risk of compressor slugging, protecting high-value system components.
• Ensures immediate lubrication upon startup by keeping oil at the manufacturer's specified temperature.
• Authentic OEM part specifically calibrated for 240V/200W technical requirements.
• Compatible with Carrier 5H series compressors and compatible HVAC/R equipment.

Is this heater compatible with 208V systems?
While designed for a 240V nominal rating, many technicians use these on 208V circuits; however, the wattage output will drop to approximately 150W. For full 200W thermal performance, a 240V supply is necessary.

How long should the heater be energized before system startup?
Standard technical protocols for 5H compressors require the crankcase heater to be energized for at least 24 hours prior to initial startup or after long periods of inactivity to ensure all migrated refrigerant has boiled off from the oil.

Does this include the insertion well or mounting clips?
This item is the heater element with leads. It is designed to slide into the existing immersion well on the compressor body. Mounting hardware is typically part of the compressor assembly or separate kit.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.