Horn no longer sounds when using remote to lock and unlock.

Press both "Lock" and "Unlock" on the key fob at the same time for about eight seconds. The horn will sound once, and the headlights will flash to acknowledge that reprogramming is complete. Stand within, 3 feet of car. God-Bless!Thats what my info, says to do!

I have a 09 kia spectra, The only time the horn will honk. is when I lock the doors with the remote. Unlocking just makes the lights flash! God-Bless! and hope this helps you out.

if this is a factory lock security system you can contact dealer for instruction sheet to re-program your remote or have them do that for you if vehicle is under warranty. if not you can go online and find the procedure for your make,model and year of vehicle. sounds like the remote's battery is need of replacing or the remote needs to be re-programmed

Check the owners manual. There may be an option to turn the chirp off.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

I would take it back and tell them they need to fix it. it sounds like a wire for the lock/unlock may of fallen off or there is a problem with the remote stare module. wires tend to fall off if all the used were crimp connectors and didn't solder the wires together.

In your owners manual on pages 2-19 and 2-21 tells you how to change this.

Entering Programming Mode
1. Turn the ignition key to RUN, then to OFF. This will
disarm the content theft-deterrent/alarm system
(if equipped).
2. Remove the RADIO fuse. This fuse is located in the
main fuse block which is located on the left side of
your instrument panel. The radio fuse is on the lower
right-hand corner of your instrument panel. See
"Fuses and Circuit Breakers" in the Index.
3. Turn the ignition key from OFF to RUN three times
quickly (within five seconds). The vehicle will
respond by locking the doors, unlocking the driver's
door and releasing the hatch. Your transmitter is now
ready to match the vehicle. Leave the ignition
in RUN.
4. Press and hold the LOCK and UNLOCK buttons on
the first transmitter for 15 seconds. The vehicle will
respond as in Step 3.
5. Repeat Step 4 for the remaining transmitters.
6. When you have finished matching all of your
transmitters, replace the RADIO fuse.
7. Check that all transmitters work by pressing
the buttons.

Programmable Modes
Your vehicle can be programmed to one of the
following modes:
Mode 1: All Off (The headlamps will not flash and the
horn will not sound to provide you feedback that a
lock/unlock command has been received by the remote
keyless entry transmitter.)
Mode 2: Horn and Lamps/Lamps (Your horn will sound
briefly and your parking lamps will flash when you
press LOCK on the remote keyless entry transmitter.
Only your parking lamps will flash when you press
UNLOCK.)
Mode 3: Horn and Lamps (Your horn will sound briefly
and your parking lamps will flash every time you push
LOCK or UNLOCK.)
Mode 4: Lamps (Your parking lamps will flash every
time you press LOCK or UNLOCK.)
Mode 5: Lamps/Horn and Lamps/Lamps (Your lamps
will flash upon the first press on LOCK, your lamps will
flash and your horn will sound upon the second press
on LOCK and your lamps will flash upon any press
on UNLOCK.)
Vehicles are delivered programmed in Mode 5.
To change the mode, do the following:
1. Press the UNLOCK button on the remote keyless
entry transmitter.
2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the UNLOCK button, again, on the remote
keyless entry transmitter until you hear the number
of chimes that correspond to the mode selection
you want.
The mode you selected is now set. You can either exit
the programming mode by following the instructions
later in this section or program the next feature available
on your vehicle.

When programming is complete, turn the ignition to
OFF and reinstall the RADIO fuse.

The aftermarket remote starter probably reset. Do you have the instruction manual for it? You should be able to run it through the initial 'start up' options and set the horn to beep for you.

Depress lock or unlock button. Manually lock and unlock driver's door within 30 seconds. System should now lock or unlock vehicle. If not, carry out programming procedure.
Programming
When
Key added or replaced. System malfunction: Alarm LED in rear fog lamp switch illuminates for 30 seconds when vehicle is locked.
How
NOTE: A maximum of 4 keys can be programmed (one at a time).
As memory positions of existing keys are unlikely to be known: Obtain and reprogram all keys.
NOTE: Existing key memory positions will be overwritten.
Switch ignition ON. Use key not fitted with remote control. Manually lock vehicle using key. Using first key, press unlock button once (programs memory position 1). Alarm horn sounds once to indicate signal received. Wait 6 seconds. Press unlock button once to confirm programming. Vehicle unlocks. Programming mode deactivated. Switch ignition OFF. To program remaining keys into memory positions 2, 3 and 4. Carry out the complete procedure below for each key: Switch ignition ON. Use key not fitted with remote control. Manually lock vehicle using key. Press unlock button at 1 second intervals, as follows: Twice for memory position 2 (second key). Three times for memory position 3 (third key). Four times for memory position 4 (fourth key). Alarm horn sounds once every time unlock button is pressed, to indicate signal received. Wait 6 seconds. Press unlock button once to confirm programming. Vehicle unlocks. Programming mode deactivated. Switch ignition OFF.
NOTE: Ignition MUST be switched OFF between each key programming procedure

Sounds like the button to unlock doors on the fob is worn out. You can purchase a new one or used from your local recycle yard.

try honking the horn normally with horn button <key must be on> if horn works it is in the programing for comfort and convieniance system if no honk it's just the horn or wiring to horn.