Remote stopped working FTX64-2W

Question

Remote stopped working for no reason. one day it was fine, the next day i get a red light (one blink) after i press the start button. whats the problem and solution ?

I have a Jetta 2021 remote was installed at the dealer when i bought the car.

Model FTX64-2W

FCC ID 2ACKU-R2W01FM

IC: 12084A-R2W01FM

Answer 1

red blink after any button press sounds like the keypad is locked or remote batteries are due for a change.

To lock or unlock the key pad, press the [-] and LOCK buttons simultaneously.

Bottom of page 2, https://fortin.ca/download/68861/rf642w-user-guide-68861.pdf