The Carrier MRA99052-9201 Compressor Overload is an industrial-grade OEM compressor protector designed for HVAC refrigeration systems. This genuine Carrier replacement part functions as a critical thermal overload relay, utilizing a bimetallic snap-action disc to interrupt the electrical circuit when it senses high amperage or excessive shell temperatures. Rated for a voltage range of 180-264 VAC and 5-15 FLA, it provides essential protection against locked rotor conditions and voltage fluctuations that can lead to costly motor failure. As a veteran technician knows, maintaining the integrity of the compressor start circuit is vital for system longevity. This screw-on mounting component features a 2-terminal configuration for a secure fit in tight quarters, ensuring a direct-fit replacement for 1/2 to 2 HP single-phase applications. This self-resetting motor protector eliminates manual intervention by automatically restoring the circuit once internal temperatures return to safe operating parameters.

Key Benefits:

• OEM-Grade Protection: Factory-authorized Carrier MRA99052-9201 ensures precise calibration and a perfect mechanical fit.
• Rapid Response: Instantly disconnects power upon detecting locked rotor amps (LRA) or overheating to prevent winding damage.
• Automatic Reset: Resumes system operation once the thermal condition clears, reducing unnecessary service calls for simple trips.
• Durable Construction: Built with a phenolic housing to withstand the high-heat environment of a refrigeration compressor.
• Easy Installation: Standard 2-terminal screw-on design allows for quick field replacement in commercial and residential units.

Common Questions:

• How do I test if the MRA99052-9201 has failed? Disconnect power and check for continuity across the terminals using a multimeter; a lack of continuity at room temperature typically indicates a blown or stuck open internal disc.
• What causes this overload to trip frequently? Common culprits include a failing start capacitor, low line voltage, restricted airflow across the condenser, or a compressor motor beginning to seize.
• Can I bypass the overload for testing? While common for a quick diagnostic, never leave a compressor running without a functional overload protector, as it is the only defense against permanent motor burnout.

Notes

Item is Non Cancelable / Non Returnable

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.