2006 Toyota Camry A/C not cold

2006 Toyota Camry LE with 118K miles. A/C was blowing cold but would go from cold to hot without changing any settings. Now it hardly ever blows cold at all. Closed side vents and put a thermometer in center vents. Once in a blue moon temperature will read 45F but will not last long. It’s 80F outside and temperature with full cooling is 65-70F most of the time. Compared passenger side vents to driver side and passenger side vents are constantly 15 degrees cooler…driver side is over 80F. I don’t hear any unusual noises from blend door. Suggestions appreciated.

Duplicate Post.