I had to have the A/C unit and 2 blower motors replaced on my 1994 Jaguar XJS. The whole dash had to come out. Squirrels had chewed the fins off the fans and I was not getting any air movement. Now that this work has been done, the A/C is blowing hot. My mechanic is straight out until next week and can't even look at it until then. Could it be a simple A/C recharge?

 

Well, it probably is, but there's also a leak somewhere. If you get a blacklight, you might be able to find the leak if someone had put some dye in there at some time. If not, you can do that too.

To fix this, and you can do it yourself, I would suggest the following:
1. purchase a refrigerant manifold. If you have a Harbor Freight near you, buy the one they sell. It's a great deal for the money. If not, amazon.
2. purchase a vacuum pump for air conditioning.
This kit seems to have it all:
You will also need:
A. a new drier
B. an expansion valve (recommended,. not needed)
C. at least three bottles of r134a, make sure there's no sealant in it. Just regular old r134a without any additives.
D. while I'm there, I'd recommend replacing the shrader valves as well, I'd recommend these: You will also need a removal tool:
If you're willing to collect all these pieces and buy these tools, then you can fix it yourself. If not, wait for the mechanic.

If you find a leak, you may have to buy a new hose, new condenser, etc.