Daikin-McQuay 802003180 Compressor Overload

The Daikin-McQuay 802003180 Compressor Overload is an essential safety component specifically engineered for 208-230V compressor applications within commercial and residential HVACR systems. Operating as a thermal and electrical safeguard, this overload protector prevents catastrophic motor failure by interrupting the circuit when it detects excessive current draw or abnormal operating temperatures. Field technicians rely on the Daikin 802003180 for its precise trip curve, ensuring that the AC compressor maintenance routine includes a reliable defense against locked rotor conditions, phased power issues, or refrigerant-related strain. Built to handle heavy-duty cycling, this HVAC replacement part is compatible with various Daikin and McQuay units, as well as specific Tecumseh models referencing the MRA7983-111 or 8300MRAB28 identifiers. Installing this compressor safety switch is a standard procedure for restoring unit functionality after a thermal trip, ensuring the system returns to optimized performance without risking permanent winding damage.

• Precise Voltage Regulation: Optimized for 208-230V systems to ensure stable protection across common commercial power grids.
• Thermal-Current Sensitivity: Detects both heat buildup and amperage spikes, offering a dual-layer defense for the compressor motor.
• Internal Limit Protection: Helps prevent insulation breakdown in the motor windings during high-head pressure events.
• Direct OEM Compatibility: Replaces McQuay 802003180 and Tecumseh MRA-7983-111, reducing diagnostic time and installation errors.
• Rugged Construction: Designed to withstand the harsh environment of a condenser cabinet, ensuring longevity under high vibration and temperature.

How do I test if the Daikin 802003180 is faulty?
Using a multimeter set to the Ohms (?) scale, check for continuity across the terminals. A reading of infinity indicates an open circuit, meaning the overload has either tripped due to heat or has failed internally and requires replacement.

What causes this overload protector to trip repeatedly?
Frequent tripping is often a symptom of underlying system issues such as a failing run capacitor, restricted airflow over the condenser coils, non-condensables in the system, or a compressor that is starting to seize.

Is this part interchangeable with other brands?
Yes, it is a cross-reference for specific Tecumseh and McQuay part numbers including 8300MRAB28 and P83333. Always verify the MRA prefix and voltage rating before installation to ensure the trip points match the original specifications.

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.