topic Re: No Power- E298 error code in Nest Thermostats

No Power- E298 error code

CoppellTX — Wed, 24 Aug 2022 10:25:45 GMT

The A/C has been cutting out in the middle of the night, the system worked fine from about 8am to midnight. We called an HVAC pro to troubleshoot and because the system worked perfectly fine during the day, we chalked it up to a faulty thermostat; I replaced it last night with a new Nest.

I installed it at 5pm last night and everything was working perfectly; it is now 5am and I’m getting a No Power-E298 error code.

Wiring picture before Nest

wiring picture after Nest installation

Any thoughts?

Re: No Power- E298 error code

JenniferV — Tue, 30 Aug 2022 05:59:22 GMT

Hi CoppellTX,

Thanks for reaching out. Please make sure the power to the system is on. The power switch is usually in the breaker box, but in some homes, it's like a light switch near the HVAC equipment. There may be a single switch or 2 switches: one for heat and another one for cool. Make sure the power is on for both, and then check the Nest Thermostat. You can also check the Nest Thermostat wires. [Important: Turn off the power to the HVAC unit. Failure to do so may result in electrical accidents that may cause damage, injury, or even death].

Remove the Nest Thermostat display.
Check that the wires are in the correct terminals.
Check that each wire has ⅜ inch (6 mm) of exposed wire.
Check that each wire is properly seated.
Turn on the power to the system, and then check if the thermostat works.

If the issue still persists, please contact a Nest Pro.

Thanks,

Jennifer

Re: No Power- E298 error code

MelbaDT — Sat, 03 Sep 2022 12:39:21 GMT

Hey there,

Checking back in should you still need our help here. Have you had the chance to try the suggested steps above?

Best,

Melba

Re: No Power- E298 error code

MelbaDT — Sun, 04 Sep 2022 20:05:19 GMT

Hi,

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

Best,

Melba