# How To Identify Refrigerator Compressor Terminals

In the refrigerator compressor, we have three terminals but it is very hard to identify compressor terminals or find out which one is the start, run, and common. In this article, you will learn how a person can easily find out compressor terminals. For testing compressor terminals we use an ohm meter or any multimeter which have an ohm testing option I hope after reading this post we will completely understand and that identifying compressor terminals will not be more a problem for you.

## How To Identify Compressor Terminals

We know that compressors have three terminals, In these terminals one is called (the Start terminal) 2nd called (Run terminal) and 3rd called (Common terminal). But you don’t know which one is “start, “run” and “common”.
E.g: If you have a refrigerator or Air conditioner compressor and you want to identify the terminals then follow the below method.

First of all, give names to the terminals, for example, you gave names to terminals A, B, and C. Then set the multimeter on Ohm. Put LEDs of multimeter and test the A and B terminals, then check the A and C terminals and then B and C. You will find high resistance between the two terminals. For example, if you Find 50 resistance between A and B terminals (A-50-B), it means that these terminals are “start” and “run” and the 3rd one is “common”. So you find out the common terminal and now you want to identify the “start” and “run” terminal.

So the resistance between the “common” and “start terminal” will be higher than the resistance between the “common” and “run terminal”. E.g if your resistance between C and B is 25 ohms and your resistance between C and A is 15 ohms, it means that your B terminal is “start” and your A terminal is “Run”.

### Final words :

Use a high-quality ohm meter to find out the start, run, and common terminals.
The resistance between the start and run terminals will be high from the start and common Or from the run and the common terminal.
The resistance between the Start and Common terminal will be high from the Run and Common terminal.

#### Message :

I hope now you completely understood and you can easily identify compressor terminals, now if you have any questions regarding this article then you can write your message in the below comments section.

### 24 thoughts on “How To Identify Refrigerator Compressor Terminals”

• February 5, 2016 at 7:09 pm

• February 18, 2016 at 4:43 pm

• January 19, 2017 at 3:11 am

Hi,
Thanks for the article.
I salvaged a Samsung compressor from an old fridge for another project and is trying to figure out the windings and if the compressor is still good.
Measuring the 3 pairs gave the same reading across – at about 13 ohms.
Thank you.

• February 13, 2017 at 9:36 am

My bottle chiller compressor too has 2 equal windings because it gives same resistance between windings.

• May 30, 2019 at 3:33 pm

why is my compressor will run for about 5 seconds then will stop?

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