This is a video showing you how to install a 3 in 1 Start Relay. These are a universal set of relays you can use in place of the factory relays installed on your compressor.

You would want to use these to save a few bucks. These are usually a lot cheaper than the manufacture’s replacement parts.

Thanks for Watching, Be sure to Subscribe for more videos!
If this video was helpful please feel free to hit the like button.

Subscribe to Channel:

This video by Bill Newberry was liked: 3294 times

If you like this video by Bill Newberry, please support their CHANNEL by clicking on the SOURCE link below and Subscribe.



Featuring Your Videos:

By featuring your videos on our blog, your videos will receive hundreds of views daily from our website visitors, you get a backlink to your channel for followers to subscribe to your channel. This is a win/win for SEO for both of us. If you would like your videos or channel highlighted and premiered on our blog for FREE, please contact us.

However, if you no longer want us to premier your channel, and want us to remove your video and not feature your channel anymore, please contact us.

Video Post Disclaimer:

The information contained in the multimedia content (“Video Content”) or post content in general, represents the views and opinions of the original creators of such Video Content or post, and does not necessarily represent the views or opinions of The mere appearance of Video Content or the post on the Site does not constitute an endorsement by or its affiliates of such Video or Post Content. 

The Video Content or Post has been made available for informational and educational purposes only. does not make any representation or warranties with respect to the accuracy, applicability, fitness, or completeness of the Video or Post Content. does not warrant the performance, effectiveness or applicability of any sites listed or linked to in any Video Content or Post.

Affiliate Disclosure:

This post and description may also contain some affiliate links, which means that the post creator may receive a small commission at no extra cost to you if you click on some of the product links and decide to make a purchase. This channel is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to

Copyright Issue:

If you find any of your copyrighted material in this post or video, please contact us, so we can resolve the issue.

All rights reserved by respective owners.

45 thoughts on “How to Install a Universal Relay (3 n 1 Starter) on your Compressor

  1. Feroze Yacoob says:

    Thanks for sharing ur video, it helps. Now I am trying to understand how this alternative will have the compressor not running continuously. It should cycle. But how does the thermostat wiring tie in.

  2. Frank Jackson says:

    Please don’t use these. It completely eliminates the external current overload, and external temperature cut off (in layman’s terms). If anything else breaks like a thermostat, refrigerant leak. Even warmer temperatures can cause the compressor to over heat, seize, and burnout. Do your homework, use only temporarily. If a start component goes bad replace all the start components and you won’t have call backs. Don’t do a hack job, do it the right way.

  3. Waterworld 360 says:

    The Supco 3 in 1 is the only thing that makes the compressor in my 2005 Whirlpool Fridge start reliably. I changed the regular starter relay and it doesn't take long before the relay starts buzzing and then clicks off. Five minutes of unplugging the fridge resets the normal relay, but then it fails to start the compressor on the very next cycle.

  4. Bob says:

    Good video! BTW, compressors can't catch on fire! Unless you are sucking O2 into them, even then the refrigerants are non flammable as well as the Polyester lube oils! That would be the least of your concern! But If you smell something burning, it's likely electrical, and not a fire hazard! Assuming your fridge is on a 20 Amp (or less) GFI circuit breaker!

  5. Michael Magee says:

    on my boat i have a 220 fridge supplier with power from an inverter pulling from a bank of 12v batteries. IT is not quite strong enough to kick in the compressor and so i thought i would install a capacito. do i need a three in one or would a Supco app-6 boost work? Spec is 130-156uf size, 1/2-10hp, 90-277Vac? Also do i wire it directly to the compressor like you showed in your video-I only see 2 wires exiting the Booster starts capacitor.

  6. Robert Fee says:

    You need to size the 3 in 1 my amps not hp I put a 810 on my freezer won't run because it's rated for 4 amps but put on the 210 worked fine my freezer needed 6 amps the 410 and 210 versions have the same overload and caps inside just the amps are different

  7. Rachel Kuhn says:

    Thank you, this video was very helpful and fixed my compressor problem ! .. for about a weeks time. I bought a 2nd capacitor, but now the compressor only clicks once when initially plugged in and no sort of effort to turn on. I used a volt meter to test the compressor and it seems to be reading fine. Any other suggestions?

  8. michael baltzer says:

    I've had to use them on older Refrigeration units with no info other then the comp horse power. ( make sure its sized correctly),
    I have great success with them and checked the amps and temps every time I'm on site and she is just purring for a 20 year old refer unit. and for 11 to 20 bucks why not try it. Just make sure you ohmn out the terminals if they are not marked.
    C to R will be the lowest # Example 2 ohmns
    C to S will be the min # + 3 ohmns
    R to S will equal the total of the lowest two numbers added up = 5 ohmns

    hope that helps

  9. Siggy Mueller says:

    I've had one of these 3 in 1 overload relays on my ages old chest freezer (early 80s) after the original part finally gave out and no OEM replacement could be found. It worked for over 10 years until yesterday morning when a thunderstorm kicked the power off twice. I know it's the relay that went because the compressor tries to run and the unit kicks on and then immediately clicks off again. I just ordered another 3 in 1 to replace the bad one. I've also had one of these 3 in 1 units on an upright freezer for about 5 years until the compressor itself died. I don't know why you would say the 3 in 1 relays are only meant to be temporary, they have served me well for many years.

  10. connie1070 says:

    While this video is 7 years old, it’s still timely. My fridge stopped running so this 3 n’ 1 got it running in no time. I paid $12 on Amazon because Prime would have it delivered the next day. Thank you!!!!

  11. mark g says:

    If anyone is unsure of their compressor's HP rating (which is not always easy to track down), the Supco RCO210 (which may not have been available when this video was made) will work with all compressors from 1/12hp thru 1/2hp.

  12. Mah A says:

    Thanks for this video .
    My fridge when I plug in the wire the fridge light inside the fridge working but the fridge compressor and the little cooling fan the one next to the copmressoer not running ?

  13. Snowbird Pinay sa America says:

    Novice here. Trying to trouble shoot old freezer that compressor will not start. Bought the 3 in 1 and it started up right away for about 4 min. Cooled the freezer and then stopped and is trying to start but wont start. Any ideas. thanks

  14. The Cuss says:

    Saved my refrigerator today, installed a similar universal start relay/capacitor/overload I'd purchased in 2015. Back then, I purchased factory replacement locally (about $80) and used that, only lasted 6 years. Of course, Amazon has for under $15 for factory ones, but next day delivery, so I installed the universal ERP810 one I had at the house.

  15. Charlie Smith says:

    When i connected the hard start as directed i got a spark at ext cord plug then nothing,,it acted like it wanted to start but then it sparked and quit,,how can i straight wire compressor to see if its any good

Leave a Reply

Your email address will not be published. Required fields are marked *