Central Air Unit Not Cooling House

[BrendanMowgli]

I have 2 units- one upstairs and one downstairs-

The upstairs is blowing- I feel the air blowing- the thingamabob outside (can't think of the name) is operating, but no cold air. I did notice that there's no water being pumped out.

I hear its the compressor, but hopefully it's something else. Is there a few other checks I can do before I call the rapis- I mean the HVAC guy?

Thanks!

 

[Cowboyjg]

Interesting first post. FF must be establishing credability as repair gurus...

There are a number of things that could be creating your situation. From a refrigerant leak to frozen or dirty coils to something more serious although less likely. There really isn't enough information in your post to say for sure. Find yourself a good HVAC tech. They are worth their weight in gold (Right Murph?) The rules about refrigerant and the technology make them less serviceable by laymen. Get referrals and referances from friends and family and neighbors.That will help keep you from getting a bad egg.

 

[muleman]

Check for a stuck float switch in the drain pan for the condensate pump.(that is the unit that pumps out the water) If the pan on the airhandler is flooded it will prevent the compressor from running and cooling the coil in the airhandler. This is controlled by it's own float switch in the airhandler pan. You may have a bunch of snotty stuff plugging the hose from the pump preventing it from draining also.

 

[Trakternut]

Cowboy hit on one of the biggest buggaboos with a/c units, dirty coils. If you can, remove some of the sheet metal from the expansion unit (the one outside) and look. They like to get plugged up with leaves, bugs, you name it. If the air can't get through, the heat can't be removed. Sometimes a good washing out with a garden hose will do the trick. Otherwise, you might have to use a power washer with a cleaning solution. I used "Purple Power" on ours and it did an excellant job removing all the crap that cakes up. Just don't spray on electronic components directly. After you've done that, let it sit for a couple of hours to dry out and fire it up.
Freon leaks could be a culprit. If enough leaks out, a safety switch will drop and the compressor will no longer run. Time to call the service guy for sure then.
Good luck!