⚠
warning Honeywell
Error Code --
Incorrect keypad lockout code entered — the display flashes dashes when the wrong unlock code is entered.
? What Causes This
User entered an incorrect password when attempting to unlock the keypad (correct password is 1234).
✓ How to Fix It
- Press Back to go back a step.
- Re-enter the correct code (1234) digit by digit using the navigation buttons.
- Press Select after each digit.
- Press Select again after the fourth digit to unlock.
Source: page 5 of the official manual
From the manual
This error code appears in:
Honeywell T4 Pro Thermostat