For some reason, the remote control will only control turning the unit on and off. It was controlling everything then, all of a sudden, nothing.

You would have to figure out what is sending a signal to its receiver. If no signal is being sent then its the signal then it may be the receiver(board) in the indoor unit. Also, other remote controllers for, TV, fans,ps3 or ps4, DVD player, dish ect... have the potential to interfere. I've had/seen a Hunter ceiling fan turn a window unit on 5 mins after you turned on the ceiling fan. Of course the customer was hard to convince. If you want, try removing all remotes to the other side of the house. That's the cheapest thing to try. You can check all wire terminals and grounds to ensure they are tight. Other than that? Work safe!

1) clean the contacts batteries, with cleaner contacts
2) tight the spring contacts with pliers for better contacts
3) resolder the wires connector from contacts batteries
4) open the remote c, and clean the keypads with contacts cleaner
God bless you

try to remove the batteries from remote, if that don't work, unplug main unit from wall for 40 Min., and it will reset back to normal.

I press the tv button on rca remote and it wont stay on, tryed holding tv button and entering code but power button flashes twice and turns off. Entered last number and nothing happed, cant find any other help.

popa flaggy poo.

I have the same problem with my unit. I use the original remote and my Tivo remote. Both stopped working at the same time. Ocassionally they will work for awhile then stop. They always both work or both don't. Therefore it must be the TV; likely the sensor or something connected to it. Sorry I don't have a solution. Guess I need to take it to the shop.

Buy a new remote.

Basically your service did not add anything I had not tried already. I had to send the product back.

I would like a refund.