Daikin-McQuay 802007004 Run Capacitor

The Daikin-McQuay 802007004 Run Capacitor is a 4 MFD (4 µF) single run capacitor with an oval case and a 370 VAC rating, built for compatible Daikin and McQuay HVAC equipment. Part number 802007004 is also associated with the previous McQuay number MCQ802007004, so either designation may appear on older parts records and equipment documentation. This is a motor run capacitor, not a start capacitor, which means it stays in the circuit the entire time the motor runs.

A run capacitor works with a permanent split capacitor (PSC) motor to shift the current in the start winding, creating the phase difference and rotating magnetic field the motor needs to turn at the right speed and torque. A weak capacitor leaves the motor with lower torque, higher amp draw and more heat, which shortens motor life. When replacing the 802007004, match the capacitance (4 MFD), the voltage rating (370 VAC), the capacitor type and the original application rather than going by size or case shape. A replacement with the same MFD and an equal or higher voltage rating is the accepted practice, and a lower voltage rating is not.

A failed run capacitor shows up as a motor that hums but will not start, a fan that spins slowly or needs a push, a unit that trips on overload, or a bulged, leaking or burnt case. Before testing or replacing it, switch off all power and discharge the capacitor across its terminals with a proper resistor, since it can hold a charge after the unit is off. Check it with a capacitance meter and compare the reading to the 4 MFD rating, since a reading well outside the printed tolerance means the capacitor is weak. Wire the new part to the same terminals as the original, and note which wires went where before disconnecting. Verify the equipment model number and serial number as well as the original capacitor's printed specifications.

Key Benefits

• Exact Rating: 4 MFD / 4 µF capacitance at 370 VAC, the values required by the Daikin-McQuay 802007004 application.
• Run Duty: single run capacitor in an oval case designed for continuous operation with PSC motors.
• Cross-Referenced: carries the previous McQuay number MCQ802007004 for easy lookup on older equipment records.
• Motor Protection: restores proper start winding current so the motor does not overheat or draw excess amps.

Common Questions

• What is the capacitance and voltage of the 802007004? It is 4 MFD, also written 4 µF, at 370 VAC.
• Is the 802007004 a start or run capacitor? It is a single run capacitor in an oval case, used for continuous motor operation rather than momentary starting.
• How do I confirm the 802007004 is the right replacement? Match the original capacitor's MFD, voltage rating, capacitor type and application, and check the equipment model and serial number. The previous number MCQ802007004 may be printed on older records.

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.