OEM Carrier 45/5 Dual Run Capacitor for PH12NA018000ADAA Unit

The run capacitor gives your Carrier PH12NA018000ADAA the phase shift it needs to start and run the compressor and condenser fan motor efficiently. A dual run capacitor stores and releases energy on each AC cycle to keep both motors turning smoothly. When it weakens — and capacitors degrade gradually — the first symptoms are a compressor or fan that hums but won't start, a unit that trips the breaker on startup, hard-starting clicks, warm air, or short-cycling. A bulged or domed top on the old capacitor is a dead giveaway it's failed or about to. This OEM dual run capacitor is rated 45/5 MFD at 440V with the factory ±5% tolerance — the HERM terminal feeds the compressor and the FAN terminal feeds the condenser motor, with C common. Holding tight tolerance is what keeps both motor windings in their designed phase relationship. Why OEM matters here: generic capacitors are commonly built to ±10% or wider tolerance and lower temperature/voltage ratings. A capacitor reading even 10% low on MFD under-energizes the start winding, drawing high amps that overheat and slowly cook the compressor windings — the single most expensive failure in the system. OEM-spec tolerance and a true 440V rating protect that compressor. Install difficulty: 2 of 5. Tools: 1/4" nut driver, needle-nose pliers, multimeter with capacitance mode. #1 SAFETY WARNING: a charged capacitor can deliver a dangerous shock even with the breaker off — discharge it across an insulated 20k-ohm resistor between terminals before disconnecting any wires. 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.

Compatibility

This part is compatible with Carrier model PH12NA018000ADAA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

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.

Shipping & Returns

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.