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The run capacitor keeps the compressor and condenser fan motor in your Payne PA4ZNA024000AA spinning at full torque by supplying a constant phase-shifted electrical charge. It's the part that fails most often on a hot day. When it weakens you'll find the outdoor unit humming with a stationary fan, the compressor straining and tripping the breaker, only warm air reaching the rooms, or the system rapidly short-cycling. A domed, swollen, or leaking top cap is unmistakable evidence the capacitor is done. This dual-run capacitor handles both the compressor (HERM) and fan (FAN) terminals and is supplied around the 30/5 to 35/5 MFD range at 440 VAC for this 2-ton unit. Capacitance in microfarads (MFD) is the spec that governs motor performance, and the OEM part is manufactured to a tight ±5% tolerance so both motors see exactly the charge they were engineered for. Why OEM matters here: inexpensive aftermarket capacitors are often built to a loose ±10–15% tolerance with thinner foil and lower-grade dielectric. When capacitance drifts, the compressor windings draw excess current and overheat, silently shaving years off the life of your system's costliest component. Holding the correct MFD is the cheapest protection you can buy for that compressor. Installation difficulty: 2 of 5. Tools needed: 1/4" nut driver, insulated flathead screwdriver, and a multimeter to confirm the bad reading. SAFETY — a capacitor holds a potentially lethal charge even after the power is cut: switch off the disconnect AND discharge the terminals with an insulated screwdriver before you touch any wire. Photograph the wiring positions first. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.
This part is compatible with Payne model PA4ZNA024000AA. Always verify the part number against your unit's data plate before ordering.
OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.
Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.