Internal corrosion, worn-out button pads, or a cracked circuit board can alter internal resistance, mimicking a low battery state.
Pop open the key fob casing (usually using the internal emergency key blade to pry it). Swap the old battery for a fresh one. mitsubishi b1a10
When in doubt, consult a certified Mitsubishi technician or a trusted A/C specialist. A proper diagnosis today will save you from an expensive compressor replacement tomorrow. Internal corrosion, worn-out button pads, or a cracked