3310727.015 A/C Hard Start Capacitor 43-53 UF 250V Cap with New Style WSX-7

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3310727.015 A/C Hard Start Capacitor 43-53 UF 250V Cap with New Style WSX-7

Used in RV roof top Air Conditioners and Heat pumps 

NOTE: The WSX hard start resister no longer plugs into the top of the Capacitor, it now has a wire between them, the new style WSX is now 4 times stronger than the original WSX hard start resistor.

3310727.007 Starter Motor Kit

Turning on your air conditioner can take a lot of juice. Take the stress off of your air conditioner with a new hard start capacitor! This Dometic capacitor, model number 3310727.015 comes with a new mount strap and foam block. Measuring; 1-1/2" Diameter x 1-3/8" T (body) or 5" T (Total) with 7" Lead wires. The strap measures approx. 8-1/2." The L block measures 1-5/8" x 1-5/8" x 7/8."

The Dometic 3310727.007 is a motor start kit, also known as a hard start capacitor kit, designed for use with RV rooftop air conditioners—specifically Dometic’s Brisk II and Duo-Therm models

It includes a 43–53 MFD 250V capacitor and a WSX-7 solid-state relay, which work together to give the compressor a boost during startup. This is especially helpful in situations with low voltage, high head pressure, or when using a generator. It can:

  • Reduce strain on the compressor

  • Improve startup efficiency

  • Minimize light flicker and power draw spikes

It’s a direct replacement for older or worn-out starter kits and is compatible with several Dometic and Coleman models.

3310727.007 3311883.000 Air Conditioner Hard Start Kit Replace for 8333A9021 Fits for 8335-9021 9333-9021 105620-10-70 Hard Start Capacitor


RV - A/C Hard Start Capacitor Additional Information





Model 3310727.015
Color Black
Included (1) Capacitor
(1) Mount Strap
(1) Foam Block
Dimensions Capacitor: 1-1/2" Diameter x 1-3/8" T (body) or 5" T (Total) with 7" Lead wires.
Strap: Approx 8-1/2" L
Block: 1-5/8" x 1-5/8" x 7/8"
Net Weight .40
Gross Weight .60
Special Order Item No
LTL Freight No
The 3310727.015 replaces the Dometic 3310727.007