topic Re: e103 error in Nest Thermostats

e103 error

Jacquanette3 — Sun, 13 Feb 2022 05:19:26 GMT

My thermostat, which I installed in 2017 and haven’t had any issues with, is suddenly giving me the e103 error for wire Y1. I have not touched it since install. Since getting the error, I’ve followed the troubleshooting guide, removed all the wires and re wired them. Still no change. Do I really need to get an HVAC person out here for this nonsense?

Re: e103 error

OverIT — Fri, 18 Feb 2022 02:24:05 GMT

Look in the upper compartment of the air handler inside. Look for a purple fuse that says three as in three amps and see if it's blown. If it is you can get a new fuse at any Auto repair shop replace it and you may be back in business.

Re: e103 error

Ryan_G — Mon, 21 Feb 2022 20:42:15 GMT

Hey folks,

I just wanted to follow up and see if anyone is still in need of help? Please let me know, as I would be happy to answer any questions you may have.

Best regards,

Ryan

Re: e103 error

Jacquanette3 — Sat, 05 Mar 2022 18:18:49 GMT

Still isn’t working. Took the side panel off the AC and the capacitor looks like it’s in good shape. The amp doesn’t look bad either. But I have no means of testing it. I don’t feel confident messing around with my fuse box and probably wouldn’t know what I’m looking at anyways. I can send pics of what my Nest is saying if needed.

Re: e103 error

Jacquanette3 — Sat, 05 Mar 2022 18:21:12 GMT

It appears, but I have no way of testing it.

Re: e103 error

zschiffman — Thu, 14 Apr 2022 21:42:32 GMT

Same issue today with first use of ac for the season. No issue since install in 2019

Re: e103 error

Sheri1 — Tue, 10 May 2022 16:49:03 GMT

Hi Ryan, I have gotten the e103 error. I have not had any problem with this Nest Thermostat installed two years ago. I recently changed the setting from heat to cool. (It wasn't hot enough inside the house to turn on the AC yet, but warm enough I knew I would not need the heater and I wanted it prepared to come on when necessary. I also changed the setting to come on at 80°.) I took the face plate off and the Y1 has a yellow wire going to it. I see the button on the outside edge of the Y1 button is depressed. (Also the G, W1 and Rh buttons are depressed.) The rest of the buttons are up. The AC had not tried to come on before this message, but did try to come on one day after the message making me think it was working. (But I think it was just the fan coming on.) This weekend it will be 103°. I would appreciate any help. Thank You!

Sheri

Re: e103 error

golephish — Tue, 10 May 2022 21:09:17 GMT

Having the same issue. I thought it mat be a bad base, so I ordered a new nest. Setup, did the test, and now nothing. I am starting to think it is the C wire issue as I don't have one. My current theory is that the capacitor blew on the unit over the past year as I did't have said C wire. Searching for HVAC and seeing what the next money sink is. very disappointed as like the rest of the posts here, it has been working with no issue until Sunday night.

Re: e103 error

MJWimsatt — Thu, 12 May 2022 00:04:26 GMT

I am having the same issue as everyone here!! Ridiculous that the same issue keeps coming up! As Jaquanette stated, I had this installed in 201 7 and have never touched it, nor had any problems, until now and today was 89 degrees.... it seems that a Nest replacement is also futile. What can be done without wasting a lot of money???

Re: e103 error

MJWimsatt — Thu, 12 May 2022 00:06:23 GMT

Did this work for you? I too, installed mine in 2017 and have the exact problem! Never had trouble until now....getting really frustrated!!!

Re: e103 error

Srch4me — Mon, 16 May 2022 21:32:13 GMT

I called nest. They walked me thru remiving the C wire connector in the thermostat. Told to reconnect when I turn in the heat. Works but don't care for the solution. Looks like nest has a glitch. Hadn't touched the thermostat since install. Just turned in the A/C.

Re: e103 error

juneferg — Tue, 17 May 2022 13:37:17 GMT

I am having this issue right now too, just move into a house that has a relatively new Nest. You are saying that this worked for now as a temporary solution? To disconnect the C wire in the thermostat?

I am seeing a lot on Reddit about replacing the contactor on the outside unit. That might be my next move after trying this C wire thing if recommended. It's about be to 97 degrees this weekend and I can't get anyone to come out until next week.

Re: e103 error

Srch4me — Sun, 22 May 2022 02:35:19 GMT

Yes. Sorry for the typos. Disconnected C wire. Was told by nest to reconnect when I turn the heat on. All seems to be working fine. My system is five years old. No chewed wires. Fuse is fine. No icing outside or constant running of the compressor. Nest is 2-3 years old 3rd gen. Leaving it alone for now.

Re: e103 error

amit007 — Mon, 23 May 2022 07:35:43 GMT

I just turned on the heating/cooling option and the system became unresponsive with error code 103. I am seeing all sorts of answers. There is a 13 minute youtube video, but the comments there leave some doubt. Did anyone above finally resolve it?

Re: e103 error

amit007 — Mon, 23 May 2022 08:12:02 GMT

I have the exact same problem. I tried to start the hot/cold mode of the thermostat for the first time this season. The ac started, at least that's what the app showed on my phone. After a while, when the home didn't get cold enough, I checked and nothing seems to work with Nest. I can't even find a proper youtube video explaining it.

Re: e103 error

juneferg — Mon, 23 May 2022 16:11:49 GMT

I did all the troubleshooting I could with Nest, and ultimately they said it was my HVAC. Had a guy out, and it was indeed the same solve most other folks had posted about over on Reddit, needing a new contactor in the outside unit/condenser. Apparently it's fairly easy to replace (people bought the part that matched their's on Amazon), but I wanted to be sure and also am not quite that handy.

Ultimately he said something was up with the outside wire which caused the fuse to blow before the thermostat/inside unit could even talk to the outside unit (hence the system starting and stopping repeatedly every 30 seconds without getting it to stick on).

The thread is here in case it's of interest: https://www.reddit.com/r/Nest/comments/crw124/nest_error_e103_y1_wire_tried_many_things/

But I would suggest having someone out to take a look and make sure that's the issue / make sure they solve if it's a broader nest and voltage issue.

Re: e103 error

Sheri1 — Mon, 23 May 2022 16:42:58 GMT

It was the connector in the AC unit and two other components (one dead and the other going). After those were replaced the Nest was fine.

Re: e103 error

Sheri1 — Mon, 23 May 2022 16:46:18 GMT

Yes, it was that component and the connector had gone bad. He also replaced the condenser saying it was going, The Nest thermostat was fine once those components were replaced.

Re: e103 error

Sheri1 — Mon, 23 May 2022 16:46:53 GMT

Yes, it was that component and the connector had gone bad. He also replaced the condenser saying it was going, The Nest thermostat was fine once those components were replaced.

Re: e103 error

Sheri1 — Mon, 23 May 2022 16:48:16 GMT

Yes, it was that component and the connector had gone bad. He also replaced the condenser saying it was going, The Nest thermostat was fine once those components were replaced.