We had been having trouble with the A/C cooling inconsistently, but yesterday was the final straw on a 5-mile trip. The belt started squealing and would only stop squealing after turning off the poorly performing A/C. When we got to our destination a few miles later, we noticed fluid coming from under the Rover, which I later determined to be coolant. We returned to drive home several hours later, and in a few miles, we noticed a gradual rise in water temperature to around 240 degrees F, as indicated by my Scan Guage II. We slowed down to drop the temperature and made it home.
This morning, I added more coolant to the max cold-fill level, though it didn't appear to be all that low.

Now, is it possible that these issues are related?
Or, is it time for a new A/C compressor and cooling system overhaul?

More stuff to add to the list!!!

 

Could be related, but looks like you have 2 repairs to make.

Maybe your AC compressor pulley is not turning freely causing the engine to work too hard.

Pressure test the cooling system to find the leak, harbor freight kit has a cap that works.

One of the black caps is the right one.





https://m.harborfreight.com/radiator...not%20provided

 

Yessir,

It does sound like two issues. I took it for a spin around the block yesterday, and the pulley was making quite a bit of rattling noise. I didn't have it out long enough to get water temp past 100 F.