⚠
warning Honeywell
Error Code --
Invalid keypad code entered — the screen flashes dashes (--) when an incorrect unlock code is entered.
? What Causes This
An incorrect password was entered when attempting to unlock the keypad. The correct password is '1234'.
✓ How to Fix It
- Press Back to go back one step.
- Re-enter the correct code digits (1234).
- Press Select after each digit.
- Press Select again after entering all four digits to unlock.
Source: page 5 of the official manual
From the manual
This error code appears in:
Honeywell T4 Thermostat