Carrier HT32BH970 Crankcase Heater

For service technicians managing Carlyle SC/SR75-94 compressors or standard Carrier 50AK and 50AJ series units, the Carrier HT32BH970 Crankcase Heater is a critical 120V line-voltage component for maintaining lubrication integrity. This belt-type compressor heater is specifically engineered to provide 70 watts of consistent thermal energy, preventing refrigerant migration and subsequent compressor oil dilution during the system's off-cycle. By maintaining oil temperature above the refrigerant saturation point, this 70W 120V crankcase heater mitigates the risk of liquid slugging and ensures reliable starts in low ambient conditions.

The HT32BH970 features high-temperature 15-inch leads for secure terminal block integration and fits a 7-9 inch diameter compressor housing. Its durable construction is built to withstand the thermal expansion and contraction cycles common in commercial HVACR environments. Utilizing a genuine OEM replacement part like the HT32BH970 ensures the internal heater element meets the exact impedance and watt-density requirements specified for Carlyle and Carrier high-side components, preventing premature failure or tripped breakers often associated with generic alternatives.

• Optimal Oil Viscosity: Maintains proper lubrication flow to prevent mechanical wear during cold-start sequences.
• High-Side Protection: Acts as a primary defense against refrigerant migration into the compressor crankcase.
• Precision Fitment: Designed for an exact 7-9" wrap-around fit on Carlyle and Carrier scroll or reciprocating compressors.
• Rugged Electrical Lead Design: Thermal-resistant 15" wiring facilitates easy routing within the electrical cabinet.

Is the HT32BH970 compatible with 208/230V systems?
No, this is a 120V AC component. Applying 208/230V will lead to immediate element burnout. Always verify the control circuit or line voltage before installation.

Can I use this heater on a compressor smaller than 7 inches?
This belt is specifically sized for a 7" to 9" diameter. Attempting to install it on a smaller compressor may result in poor heat transfer or a loose fit that could damage the heater element.

How do I confirm the heater is functioning during a maintenance call?
Check for amperage draw when the compressor contactor is de-energized (assuming it is wired through the auxiliary contacts) or perform a resistance check to ensure the element has not gone open-circuit.

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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.