IUniden Max 5 cordless phone with base unit flashes 88

Either the base is defective and not keeping the battery charged or the wall outlet or voltage adapter plug is defective.

If there is an error code with an E followed by a number or "88" displays/flashes it would be an internal issue in the base unit. Uniden does offer a limited 1 year warranty (Covers Manufacture Defects ONLY, if caused by a power surge or power outage or any other type of damage that is not a Manufacture Defect this is not covered under warranty) off the proof of purchase. The proof of purchase is required for warranty service.

Range form base should be less than 100feet in most all homes don't think they are designed for long range ever

I spoke to the manufacturer this morning because I was having the same issue ... I was told that the flashing 88 means that the base unit is has gone kaput and is no longer working. period.

customer service said that this can happen due to electrical issues and the company will send me a new base unit and handset to replace the one that no longer works.

I just got off of the phone with Uniden for the same issue with my D1680-4. The alternating "8" - "88" code is an indication that the base is dead. They will be sending me a new base (and 2 handsets). During the call I learned that if you do not have a receipt, Uniden warrants their phones for up to 15 months. The advertised 12 months, plus 3 months for the product to get from manufacturing, through distribution channel and finally sale to the consumer.

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.

try connecting both phones via the base that is working and see if they recognize each other. Let me know if that works.

Our handsets and base are flashing and the base is lit up constantly.
My model is Power Max 5.8ghz.
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Press and hold "end" and "#" for more than 5 seconds this will de-register your handset without the base unit.
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see for more info. http://www.uniden.com.au/RESOURCES_MAIN/pdfs/ELITE8805_OM.pdf

You need to reset the main base unit. Unplug the power from the back of the base. While the power is disconnected, press and hold the delete key while reconnecting the power. Wait for a long beep tone. When the display shows 88 or P, press play button one time. If you have a phone without an answering machine, disconnect the power from the back of the base, press and hold find hs button while reconnecting power.