Jump to content
Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Contact


DISCLOSURE: We may earn a commission when you use one of our coupons/links to make a purchase.
  • Upcoming Events

    • 26 April 2025 02:00 PM Until 03:00 PM
      0  
      All are invited to join in the conversation for all things Appliantological: bidness, customers, tools, troubleshooting, flavorite brewski, whatever. Webcams and microphones are open and live!
      Also, follow this Calendar Event so you'll get notified of new posts here. Look for the "Follow" button either at the top of the topic on desktop or below the topic on mobile.
      Who: This workshop is available to everybody, including you! You don't have to be a member of Appliantology to join the fun.
      When: Saturday, April 26 @10:00 AM Eastern Time.
      Where: Online via Zoom
      How:
      Click here to register. If you're interested, register now. Arrive a couple minutes early to make sure your connection is working. Set a reminder for yourself for this workshop so you don’t miss it. 

Old motor has 3 wires, new motor has 4 wires, WTF?


applianceman18007260692

Recommended Posts

Posted

You always want to save a few bucks in these tough times right? Don't want to spend a fortune replacing the motor with the exactamundo. So you bought a generic motor with the same hp, speed, and amp rating. You get home and BOOM the thang has more wires than your old one. Do not panic. The new motor has several ways to connect common. The HVAC shop should sell you a new capacitor. Your old cap may not work on the new motor because it may not be rated the same, the 2 brown wires go to that capacitor. TIP: You need to secure the new capacitor where it won't short against anything, tape it up good. So that leaves 2 wires now instead of  3 you originally had, black and white. You connect black to black where it always went on the contactor and you connect the white one to the common. There may be some more wires that have to do with direction but that is easily explained on the motor. The HVAC guy will get it going in the right direction before you leave the shop if you bring the blade in. Your old motor had 3 wires.

 FYI: The old capacitor has 3 connections, HERM (hermetically sealed compressor), C (common), and F (fan).  The old motor had a white wire (or purple) that went to the old capacitor marked C (for common), the black wire to the contactor (for hot) and the brown wire to the F on the old cap. The new motor can be set up that way also if you prefer to do it that way. Providing the old cap is rated the same for the new motor you can attach the plain brown wire with a clip on it where the brown wire went on the old cap marked F. The other brown wire with white stripe and a clip on it would go to C on the old cap (for common) The black wire goes where the black went on the contactor. The remaining white wire would be taped off and not needed but it would be live so it needs to be taped off and out of the way. Got it? LOL

  • Replies 0
  • Created
  • Last Reply

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...