Uniden TRU9485 Cordless Phone Logo

Question about Uniden TRU9485 Cordless Phone

2 Answers

E4 error code

Help!!i have a e4 error code on my uniden phone

Posted by jinni on

  • 10 more comments 
  • christopherj Jan 14, 2008

    uniden TRU9485 phone has stopped working and only read out with "E4" on the base unit screen read out. error code E4.

    Thanks for any help possible

  • gome Feb 07, 2008

    My Uniden 5.8 digital phone base also has the e4 error code. The phones are seven months old. I have tried calling the telephone number in the owner's manual and have had no luck in reaching anyone.


  • winag Feb 09, 2008

    flashes e4 cycled power no luck

  • tomasito Feb 10, 2008

    in my philco split unit air conditioner 24000 btu is displayed the e4 error which turn off the unit. the unit works for about 8 minutes and then here you go, the e4 error and the unit goes off.


  • Anonymous Feb 10, 2008

    I just got the E4 error code today and can't figure out the fix...anyone know? Thanks

  • CheleSirois Feb 14, 2008

    I, too, have the e4 error and cannot get help resolving this. My phones are not working at all.

  • Anonymous Feb 24, 2008

    The main base displays E4 24/7. The handsets say "Models vary! Place you handset on the base to register" and when I do that, it says, "Please wait...Registering." And then the handset changes back to "Models vary etc." I tried unplugging the base for a few minutes and plugging it back in. As soon as it was plugged back in, it displayed 88 a few times, and then back to E4 right away.

  • amazingc Mar 06, 2008

    I have the same problem with the E4 error code for my Uniden9480 Cordless phone.

  • Anonymous Mar 26, 2008

    Same E4 showed up on my TRU9085 (same as 9485) last night after a power outage. It doesn't respond to any buttons.

    Apparently some of the base units can be reset and come back to normal, due to a corruption in the answering system data. It wasn't the case with mine...

    Anyway, I've called Uniden and the very nice lady gave me the hard reset procedure (not found in the User Manual):

    - disconnect the power from the unit

    - press and hold the following 3 buttons while connecting the power: DND, *(star) and the left hand-side top silver button.

    You should hear a long beep if successful. You'll need to re-program the base, since EVERYTHING WILL BE ERASED INCLUDING: messages, caller ID, etc.

    This procedure will bring the system back to Factory Default status, so again: ALL THE STORED DATA WILL BE ERASED.

    I hope this helps some of us having this E4 problem.

    John T

  • deltadeb May 10, 2008

    help e4 error on uniden 9480-3 phone email me at [email protected]. I dont have a * button on the base to hold with dnd? hello please help. I need a phone in my house small baby

  • Anonymous Dec 26, 2008

    e4 error code

  • deltadeb May 11, 2010

    what if there is no * star button on base unit. What do you hold down??



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Exact same problem. E4, sent uniden an email thru their website though I doubt Ill hear any response. Very disappointed as the 9485 was working great until all of a sudden E4 showed up.

Posted on Mar 14, 2008

  • nikzig Mar 14, 2008

    I just spoke with Uniden customer support. They said that the E4 message is an error code saying that phone is "broken beyond repair." They said for me to return the phone to the store that I bought it from and if they wouldnt take it to call them back and they would see what they could do about replacing it free.

  • nikzig Mar 14, 2008

    Here is more info directly from a Uniden email:

    Our Solution :
    Thank you for using our system.

    Thank you for contacting Uniden with your question.

    If there is an error code with an E followed by a number it would be an internal issue in the base unit. Uniden does offer a limited 1 year warranty off the proof of purchase. The proof of purchase is required for warranty service. Uniden phones that are purchased in the US or Canada are only made for use in the US or Canada. Using this phone in other countries will void the warranty and also may damage the unit due to the differences in electrical standards. Also the unit may not work as specified.

    Uniden's warranty only covers purchases made for new products purchased directly from a verified retailer. Units purchased from E-bay, garage sale, etc. or companies that refurbishes phones and then sells them would not be covered under warranty. You would need to address this with the place of purchase or you may take advantage of the Out of Warranty procedure.




Same problem showed up on my 9085 (same as 9485) last night after a power outage.
Apparently this happens due to some corruption in the answering system and some base units can be reset back to Factory Defaults by a hard reset.
I've called Uniden and they gave me the procedure:
- disconnect power from base
- press and hold these 3 buttons while re-connecting the power to base: dnd, * star, the left hand side button of the 3 top silver ones under the LCD.

If the procedure is successful you should hear a long beep.


Hope this helps some of us having this annoying E4 problem.

Good luck,

John T

Posted on Mar 26, 2008


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Related Questions:


Phone flashing 88 8 now flashing e4 cannot get dial tone.

Your manual may have the E4 code, but Uniden certainly will, if you contact their support site. This symptom often indicates a power or function issue with the base unit, and so make sure the base has charging voltage, and the terminals are clean (use a qtip and alcohol). When you contact Uniden Support, have your model number ready, since different units can have the same or different error codes programmed into them.
Good luck, and hope this helps.

E4 Error is showing on Uniden 5.8 GHz expandable phone. Power may have been disconnected. An ideas on a solution?

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Error #4, You probably need to reset the phone by unplugging the main unit from the power source then plugging it back in abd re registering the handsets by setting them in the main cradle for about 10 seconds each. if this doesn't work try the manual if you have it still and see what E4 error means. Good Luck. Sometimes with electronics all you need to do when they wont work is unplug then and plug them back in while holding the power button on. This is amazing trick that no one wants anyone to know about. it works great on VCR's and DVD players.

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Customer support 1 800 297-1023 told me that this means the base unit is defective and can't be repaired. I also was told that none of my remote units are compatable with other models.

E4 error code

I called Uniden about the same problem.  They say it is a code that means it is defective base unit.  I had purchased it within one year and they will gladly send me a new one.  I don't know if they will offer anything beyond the one year mark. 

They say it was a spike in the power lines that causes this error. 
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