What does message waiting L1 mean? - RCA 25425RE1 Phone

Retrieving Messages on the Answering Machine
Press and hold either the "Answer L1" or the "Answer L2" button, depending on the line from which you want to retrieve messages.
Retrieving Messages on the Answering MachinePress and hold either the "Answer L1" or the "Answer L2" button, depending on the line from which you want to retrieve messages.

First you need to remedy failure or any leakage than reset appliance.
Under Reset I mean to delete all alarm stored in memory.

1. Turn off the dishwasher.
2. Press and hold S1 while switching on the dishwasher. Keep
holding the Program button until:
- LED L1 blinks, L2 and L3 is on
- Release S1
3. When L1 is blinking, L2 and L3 is on, press the S1 before L2 and
L3 is turned off.
- LED L2 is blinking, L1 and L3 is turned on.
4. Wait till L1 and L3 is turned off, then press S1
- All used LEDs flash 5 seconds on 1 second off repeatedly.
- If buzzer is equipped, it beeps for 5 seconds
- The alarms saved in the memory are erased
5. Switch off the appliance.

Dado

I had the same issue on my RCA 25255re2 and worked with customer service at RCA. They had me hold down the delete button for 5 seconds, release the delete button, then press delete one more time. That cleared the phantom L1 message waiting issue we were having at my office

See this article - Bose L1® What Do the LEDs mean?

PS1 Powerstand Bose L1 Encyclopedia FAQ Wiki

L1 Means Line Voltage L2 means Line Voltage

If you have 220 as your supply voltage than one side would go to L1 and the other to L2.
Hope this helps if you still have problems post another post along with more information as to what voltage you have.

I don't see a reference to a L1-18. A L1 code is a scanner feed problem. I only show a L1-00 code. Sorry.

L1-00 means that the scanner unit under the glass was interupted in it travle and didnt return to home position within a specified time. Often you can restart the power to clear this.

When [L1-00] appears, the scan head
locking switch is locked. Turn off the
power, release the scan head locking
switch, and turn the power back on.
If this don't work, turn off the power
and wait 10 seconds to reset.

Error code L1-00 indicates that the scanner is locked down for transport. There is a dial under the scanner by the paper output tray. Rotate the dial, and the error message may be cleared. The dial controls the scanner lockdown mechanism.

DelVar x