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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Midea air conditioner error codes. Indoor unit error code explanation: R series: ... E1, Indoor / outdoor units communication protection. E2, Zero-crossing signal error ... E4, Outdoor unit temp. sensor or connector of temp. sensor is defective.
Generally, the E4 error code means that the sensor in the pc is faulty and needs to be replaced. Contact the place where you bought it immediately (if it's still under warranty) or contact the manufacturer to ask for a replacement.
Typically on an Electrolux induction cooktop the "E4" error code stands for key sensor for timer. Which means you could be experiencing an issue with the right board, center board, or left board. I would perform a reset on your cooktop and you can do that by flipping the household circuit breaker off for ten minutes.
If that does not assist with clearing any false error codes or the error "E4" continues to display I would suggest seeking assistance from a professional for proper diagnosis and repair. Hopefully this helps. -Matt
Error code E4 means there is an overflow. Water is probably trapped. If you get error code E4, just tilt the machine back about 45 degrees and let the water drain out. It should come out on both sides. Then, you should be good to go.
The e4 that displays on your air condition come up simply because there is an error during the operation of the system. E4 means Error 4 which is a code that is interpreted as low pressure switch.
E4 simply means there is low pressure switch, the pressure switch turns on automatically inside the air condition, so when you turn it on sometimes the switch jams and does not open so the air condition will be on but would not get cold because the switch jammed and it displays an error signal to let you know there is a problem in the system.
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.