I have a 2005 Nissan Almera with intermittent remote door locking issues. When the weather is very warm the car wont unlock but will lock.

It's not the handles I've struggled with these issues on 3 altimas it's the door latch itself it's from moisture it's worse in the winter if I run the car for a couple hours with heat on the door opens also if you repeatedly lock and unlock the door with the power lock it will release eventually. I've been locked in my 04 Altima multiple times and had to lock the door sometimes to get it to hold shut these cars are nutorious for door issues

does your unlock button work in car? If it does, do you have another keyless entry key fob? If so does it work? If you just replaced the battery you can try removing battery and cleaning contacts within remote. I know some of the nissan altimas had the same issue and the only solution was a new key fob. Good Luck

Try the following:

"KEY FOB PROGRAMMING
NISSAN
SYSTEM DESCRIPTION
The Central Door locking is controlled by the Multi-Remote Control system which controls
the door locking, door super locking and hazard reminder. When the doors are locked and
unlocked the unit flashes the hazard lights once for lock and twice for unlock.
A maximum of four remote controls are allowed to be programmed.
ALMERA
ALMERA TINO
PRIMERA
MAXIMA
MICRA
SERENA
VANETTE CARGO
TERANO II
Ensure all the doors have been unlocked, either by using a good transponder key or remote
control plip key.
Procedure
1. Turn the ignition switch from Position 0 to ON 6 times within 10 seconds.
2. Then turn ignition switch to OFF position. Leave key in ignition switch.
3. After 2 seconds, the system will enter programming mode and will flash the warning
lights twice.
4. Press and HOLD the unlock button on the Plip.
5. While pressing the unlock button, press the lock button 3 times.
6. Release the unlock button.
7. The warning lights will flash once to indicate successful programming.
8. Repeat procedure 4 to 7 for up to 4 plip key?s.
9. When completed turn ignition ON, and the warning lights will flash 2 times.
10. Remove key, and check all plip key?s for operation.
NOTE : The programming mode will stop when either the ignition is switch ON, 4 plip keys
have been programmed or no input signal either from the switch or plip keys has been received
for 120 seconds."

Sounds like the rod that goes from the lock to the key came off. There is usually a little plastic clip that holds it together and they break and you get what you are experiencing. You have to take the inside panel off of the door to get inside it.

The key fob is the remote. But the remote type that works like a key. The remotes that you just need to carry on you to start the car or truck. That is a Key Fob.

Thanks Jay!

check the battery in the key control it may be faulty

All four door lock actuators were bad, fussed enough with dealer , they are fixing for free, save me $1600!

hello mate.. if it has stopped working you might want to check the battery first.. if you are sure that the battery is fine then consider reprogramming the fob to your car.. here are the steps to follow.. NISSAN

Remote Control Fob Procedures:

The Central Door locking is controlled by the Multi-Remote Control system which controls
the door locking, door super locking and emergency hazard reminders.

When the doors are locked and unlocked the unit flashes the hazard lights once for lock and twice for unlock.

A maximum of four remote controls are allowed to be programmed:

ALMERA
ALMERA TINO
PRIMERA
MAXIMA
MICRA
SERENA
VANETTE CARGO
TERANO II

Ensure all the doors have been unlocked, either by using a good transponder key or remote
control plip key.

Procedure:
1. Turn the ignition switch from Position 0 to ON 6 times within 10 seconds.
2. Next, turn ignition switch to OFF position. Leave key in ignition switch.
3. Wait 2 seconds then the system will enter programming mode and will flash the warning
lights twice.
4. Press and HOLD the unlock button on the Plip.
5. While pressing the unlock button, press the lock button 3 times.
6. Release the unlock button.
7. The warning lights will flash once to indicate successful programming.
8. Repeat procedure 4 to 7 for up to 4 plip key's.
9. When completed turn ignition ON, and the warning lights will flash 2 times.
10. Remove key, and check all plip key's for operation.
NOTE : The programming mode will stop when either the ignition is switch ON, 4 plip keys
have been programmed or no input signal either from the switch or plip keys has been received
for 120 seconds.

http://www.autokeysquad.com/nissan-fob-programming

i hope this can help you.. :)