Always match the MFD value exactly. Voltage can be equal or higher (440V replaces 370V) but never lower. Round and oval are interchangeable if the MFD and voltage match.
3W1 – HARD START KIT (3 WIRE, 1-3 TON)
$41.20
Supco 3W1 hard start kit for 1-3 ton compressors. 3-wire design with potential relay and start capacitor. Gets stubborn compressors running on hot days.
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm | In-Store Pickup Only
Description
If your compressor hesitates or trips the breaker on hot days, a hard start kit helps. The Supco 3W1 is a 3-wire kit with relay and start cap — stronger boost than 2-wire kits for 1-3 ton compressors.
Specs: 3-wire, 1-3 ton, potential relay + start cap, Supco CSRU1
Replaces: 3W1, CSRU1
Fits: Single-phase compressors in 1-3 ton AC and heat pump systems. All major brands.
Need help? See our AC Not Cooling Troubleshooting Guide or Capacitor Cross-Reference Chart.
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
