Nest thermostat has detected a problem with the Y1 wire E103 Nest 103 how to fix it?

This wire controls the cooling system in your home, and if it is shorted, your #Nest thermostat will not be able to communicate with your HVAC system.

I will show you how to check the Y1 wire for shorts, and how to replace the contactor if the wire is shorted. I will also show you how to check the #capacitor, which is another component that can cause this error code.

By the end of this video, you will be able to fix Nest error code #E103 yourself, and you will save yourself a lot of money on service calls.

Timestamps:

0:00 - Introduction
0:30 - What is Nest error code E103?
1:00 - How to check the Y1 wire for shorts
2:00 - How to replace the contactor
3:00 - How to check the capacitor
4:00 - Conclusion

Tools and materials needed:

- multimeter
- screwdriver
- contactor
- capacitor

Safety precautions:
Make sure to unplug the furnace before you start working on it.
Be careful when working with the contactor, as it can be dangerous if it is not properly discharged.

I hope this video helps you fix the Nest error code E103!

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Nest thermostat has detected a problem E103 How to fix it? / Orange County California
#hvacinstallation #acinstallation #heatpumpservices
#hvaccontractor #hvacrepair #hvacr #heatpumprepair #hvac #nesttechnical

[diegogimenez]

Thank you. Life saver. Fixed it for $19.99

[ptron]

You're a genius!!! $11 for the new contactor switch. Thank you so much for making the video

[GustavoHerrera-svwo]

I very rarely enter comments to videos posted in youtube however, I felt almost obliged to add mine today. On Friday I noticed the same issue you reported in your video, I measured the resistance of the coil of the failed contactor and it measured 1.3 ohms. I ordered a replacement from amazon and it was delivered to me today Saturday morning. The new contactor from American Zettler measured 13.6 ohms. It took me less than 20 minutes to replace it following your video and my AC is up and running again. No more Y1 E103 error in my Nest AC controller.
Thanks, you save me probably hundreds of dollars (I paid $14.48 for the new contactor) and you helped me to have a better understanding on how the AC systems and the NEST controllers work.
Needless is to say that the help from NEST was very, very limited and did not point me in right direction.
Once again thanks!

[josephklapiszewski]

Dude, you the man, cost me $41 to replace both contractor and capacitor. Ac running cold again 👍👍. Thanks!!

[rodrodriguez]

Excellent video. Quick n efficient. 🤙👍👌

[kliu]

Thank you! We had the same problem. $12 replacement part from Amazon + educational experience for the kid.

[abegeo]

This worked for my carrier unit. I also replaced my capacitor at the same time since my unit is from 2016. The part cost me $18 on Amazon local HVAC store wanted $50.

[kimberlymyers-ep]

My nest thermostat does this at least once a summer season randomly.. it only wants me to pull the wire out, run the wire stripper tool along the exposed wire and then plug it back into the slot... did it today and then works fine

[philipjoseph]

I replaced the contactor and problem solved 😅

[nadirnazim]

wrong title. your video shows Y1 wire while title shows Y2 wire. I have the Y1 problem. I am going to check the contactor.

[GP-SEA]

Nice video - BTW 5% of 45 is a tad over 2 - so if it shows less than 43, it is probably a good idea to replace.
Also looks like you swapped in a double-pole contactor for the original single-pole. Interesting.

[luisortho]

Yup, Yes Sir 🧐, Thanks, I Appreciate It 👌🏻🙌🏻😎.

[MrCraighead]

So question. If my AC still runs and is mostly cold does this mean it's something else?

[hermilo]

Weirdly enough I tested the contractor and it was bad reading at 1.2 ohms, and I replaced it thinking it would fix the issues but I still get a e80 no power to y1 error :/. Any other ideas?