My CAssette reverse airconditioner wont respond to remote. Changed batteries worked 2 times then stopped

open the remote case resolder dry joints

Drain motor get locked. call repairman to disassemble your indoor for drain pan cleaning and reset. Unit will work o.k.. Helpful?

Not if the same brand as the unit. Sensor may went bad or has the remote been damaged or spilled on?

Okay here's the fix.
Remove batteries. Re-install them wrong side in! Don't panic.
Reverse the direction of both the battery cells and install. Press "Power" button a couple of times and a few other buttons a few times. Then remove batteries and re-install the right side in.
Voila.

Unplug the unit for about 5 minutes and then plug it back in. If it still does not respond to the remote after that something has happened to the control panel. It should take 3 minutes after the unit is unplugged and then plugged in again before the compressor starts. (Self protection circuit) You can try turning off the circuit breaker and then turning it back on again also. I believe that your unit will work fine after trying these recomendations. Good luck.

I purchased a LAZBOY universal remote (at Fred Meyers, on sale for $9.99) and after a bunch of research and trial-&-error, was able
program it with a code (1629) which works reasonably well with the
Bose 3-2-1.

I don't have all the system-level functions (which I never utilized anyway) but do have all the basics as far as power, volume, source, and CD/DVD control.

Had the same problem and took the battery out of the camera to reset. Worked fine after that.

press stop button then the power button together the player will go off. put it on again the remote should work.

a system remote is the only option for you here. The deck does not have its own remote receiver. Sorry to break the bad news to you.

3 flases indicates a communication error. Have a technician check wiring and connections.