Intermittent A/C 1994 Toyota Corolla

Symptoms

1. Refrigerant is not low. I repeat – refrigerant is not low.

2. A/C is not “freezing” up.

3. A/C works every morning. Turn off A/C or stop and get gas after engine is running for 5 minutes and hit or miss if A/C will turn back on.

4. On hot afternoon A/C may not blow cold. Turning on A/C will result in “click” from what I can only assume is A/C clutch engaging and engine sounds as if there is slight strain put on it, however, A/C tube is NOT cold.

5. Let the car cool down and crank up several hours later at 11PM and A/C runs like a champ. A/C tube checked earlier is now cold.

I was thinking this was the A/C relay but I hear that standard “click” and slight strain put on engine even when A/C is not working so ….. second guessing myself now. A constant given is A/C will work on warm days. On very hot days or if A/C is turned off after driven a few miles A/C may not turn back on until evening. No issues that I am aware of with dash electrical – again – turn on AC and “click” with slight engine strain though A/C tube not cold.

What is the scenario where clutch engages but tube is not cold (until you let engine rest and crank up at 11PM and all is fine)?