Only one capacitor in AC unit


Old 07-30-19, 08:49 PM
Thread Starter
Join Date: Jul 2019
Posts: 2
Received 0 Votes on 0 Posts
Only one capacitor in AC unit

Iím wanted to replace the capacitor and contactor in my AC so I opened the panel, noted the ratings, ordered a dual run capacitor from amazon. Capacitor arrived, I went back out there only to notice that the original round capacitor only has 2 terminals and one pair of wires attached. There is no second capacitor in sight. Will someone kindly explain? Donít all ac units have a start and a run capacitor?

Thanks in advance for your help.
Sponsored Links
Old 07-31-19, 03:35 AM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 10,135
Received 35 Votes on 33 Posts
Thumbs up Welcome to our forums!

It is uncommon for a residential ac unit to have a start capacitor.
To have a start capacitor would mean that there would have to be a start relay which is a cost most companies don't want to add.

You would expect to see a dual capacitor for the compressor and condeser fan motor.
If yours is a single circuit capacitior the fan motor capacitor could be attached to the motor.
You can use the dual capacitor if the rating matches yours and there is space to mount it.
Old 07-31-19, 10:56 AM
Thread Starter
Join Date: Jul 2019
Posts: 2
Received 0 Votes on 0 Posts
Thanks so much! I put the dual in like you suggested. It’s actually a bit smaller than the original capacitor. That’s why I assumed it was a dual without looking at the terminals. A capacitor that big simply couldn’t have been a single, that was my line of thinking
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: