@dgerety Epson has updated driver's that you may not have installed.  (I typically can not provide direct links at my level), so you will need to go to the Epson support page for the ET-3850 -> Downloads - select macOS 15.x (Sequoia) (pull down option) -> Drivers

You should have Printer Driver v13.26

and Scanner Driver and Scan 2 Utility v6.7.84

Based on the instructions you would have installed an older package dated 02/07/24, which would not include these.

Also try to check for a firmware update for the printer:

Applications -> Epson Software -> EPSON Software Updater (which may cover the drivers concern above)...

  @jzchen 

Thank you. The printer firmware is current. The only recent driver at Epson was for the scanner, which I installed, though I can't tell if it's any newer than what is already installed. The printer is working at the moment, so I'll wait and see. Thanks again. 

Hola @dgerety me llamo Pau Monreal y soy beta tester y amante de la tecnología

lo que describes es bastante común en impresoras Epson cuando trabajan en redes Mesh como las Deco. Lo que normalmente lo soluciona es:

1. Actualizar drivers de Epson para macOS 15.x (Sequoia). Entra en la página oficial de Epson para el modelo ET-3850 → Descargas → selecciona macOS 15.x → Controladores.
   • Deberías instalar Printer Driver v13.26
   • Y Scan 2 Utility v6.7.84
     Los paquetes de julio de 2024 no traen estas versiones, así que es importante bajarlos de nuevo.
2.  
3. Actualizar el firmware de la impresora desde el Mac:
   Aplicaciones → Software Epson → Actualizador de software Epson. Esto corrige problemas de desconexión en redes Mesh.
4. Extra que ayuda mucho:
   • Reserva una IP fija para la impresora desde la app Deco (Avanzado → Dirección IP reservada).
   • Si sigue dando problemas, conecta la impresora solo a la banda de 2.4 GHz, ya que algunos modelos de Epson se confunden con el band steering entre 2.4/5 GHz.

Con esas tres cosas normalmente queda estable y no se desconecta cada pocos minutos. 

aqui tienes el link para los drivers

(Falta poner el http://www.)

epson.eu/en_EU/support/sc/epson-ecotank-et-3850/s/s1965 

  @PauMonreal Paul, thank goodness for Google Translate. Thank you for your recommendatons. I will check all of my drives and follow your guidelines. Muchas gracias, and buenos dias (that's about the limit of my Español). David. 

  @dgerety thank you im here for help :) yeah sure, sorry for the answer in spanish next time I answer in english check my instructions and tell me if you sold the problem,  Looking forward to hearing back from you! 

good morning. 

  @PauMonreal Will do, Paul. Spanish is fine. I think Google Translate is pretty accurate. :-)

  @dgerety thank you so much David

  @PauMonreal Thank you, Paul. I've verified that all of the drivers and firmware are current. The printer was new on 2/7/2025 (this was never an issue with my Canon printer). I've also reserved the IP address, I think. I opened the Deco app, went to the list of all IP addresses, found the only one for Epson and clicked reserve. My Epson V600 photo scanner is off. I've switched my Mac and the printer to the 2.4gHz band, though very soon I'm going to crawl into the attic and run Ethernet from the Deco to my Mac. Even though the router is only about 20' from the Mac, the wi-fi is very inconsistent. If all goes well, I'll let you know. Thanks again, David.