Try last 5 digits of serial number. Key pad only does 1-5
6=1 7=2 8=3 9=4 and 0=5. Ie. serial 14632 would be keyed in as 14132. 19746 would be keyed in as 14241

Zeeker,

Without having the correct password, you will not be able to clear the codes. If you know where the lift came from, try using the zip codes around that area. If the number of attempts is turned on, you only have nine tries before it will time out. Good Luck.