WOW. Just did it, and guess what? No reading, though I tried 3 times, BUT, I then pushed the on button and for the first time in a long time the fan speed was working properly, and it seemed to have cold air. I need to drive it to confirm.Have you done the self diagnostic yet? Hold down the Auto and Off buttons, and the HVAC box will run through a self-test and display any error codes for you.
Thank you. I have no idea whether clutch is engaging or not. I will probably have to take it to a proper ac guy to sort outUnless you have any suggestion that the MAS is going bad, I would not replace it as a "maintenance" item. Too expensive IMO ($90+ for a new one). So if it was me, I'd leave the old one in there until you get some indication that it is messing with you. I've had mine since new and now has 175k miles on it without any problems. If you got it off, you may want to clean it with MAS cleaning spray though.
On the AC situation, would follow Doug's advise on checking if the clutch is engaging and also check if you have enough refrigerant in the system (if low, compressor clutch will not engage and you will get hot air only). There are quite a few things that can go wrong with the AC system; anything from leaks, problems with the air recirculation or air distribution flaps, electrical issues, bad pressure switch to a failed compressor etc.. If you don't have manifold gauges, you may want to invest in a set. Harbor Freight sells them for $50-60 or rent a set for free at an automotive store. Knowing if you have refrigerant in there is a very good start and then refine troubleshooting from there.
Did you miss my post above yours? Waiting for replacement AC PRO to attempt chargingYou need good lighting to see it. The light from a mobile phone won't do usually. It can be a bit tricky to see it from above as there is a lot of stuff that obscures the vision in that area, especially for an untrained eye. Why not just swing by a Valvoline Instant Oil Change place (I know they have them in FL too). They do some limited servicing on AC systems and they could verify if you have pressure in the system or not. Don't think they would even charge you to check that.