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hedwards89 · Jul 11, 2013, 02:28 AM

I have a Carrier central air unit, it's part number is - 58STA090 - - - 10116.
The model number is - 58STA090 - 16

The unit is making a "long drawing" sound, it's trying to start, but eventually shuts off . I checked the filter and it was really dirty, so I'm going to replace it, and in the mean time I shut the air off.. I live in Texas, so I have to get this fixed asap. Any help before I attempt to call a technician and waste a whole ton of money that I don't have?

smoothy · Jul 11, 2013, 05:12 AM

Did you see if it runs without the filter in it? Until you can go to the store and buy another today?

Stratmando · Jul 11, 2013, 06:51 AM

With the filter out, look up at the coils and see how dirty or clogged they are.

hedwards89 · Jul 11, 2013, 05:27 PM

https://www.youtube.com/watch?v=mgkn...y_vdcMTtA5gx2w

Hey guys,

I decided to make a video to better explain my problem, and I had a question about the coils and how to access them.

Also, if left off long enough (say 30-45 minutes) if I turn it on, it will eventually kick the motor to full speed, it just takes about 20-30 seconds of slow turning to get there.

I really appreciate it

V/R

Harrison Edwards

smoothy · Jul 11, 2013, 05:36 PM

Now THAT is a quality description...

hedwards89 · Jul 11, 2013, 05:41 PM

I'm horrible at catching sarcasm over the net, sooo If that wasn't sarcastic, then... Thanks :D I really need to fix this, so I thought a video would be best!

smoothy · Jul 11, 2013, 05:45 PM

That little fan is to provide enough of a flow on the exhaust as that is an ultra high efficiency unit and exhaust temps are low enough it wound draft on itself.

The other things you were focusing on are the burners on the furnace side of things...

The Evaporator coils will be on the TOP of the furnace roughly about 5 feet up from th floor where the ductwork starts.

You have to look for some access panel or something in that area. Some were installed by complete morons... like the one in my house... and I'd have to cut one into it. I'm serious if I ever met the guy that installed mine (before I bought my house) I'd plant my size 11 shoe in his butt.

First thing I would do... is reach around the side and see of the big squirrel cage fan.. (where that capacitor is mounted) spins freely and easily... I'm guessing its not going to and its hard to turn.

smoothy · Jul 11, 2013, 05:47 PM

Originally Posted by hedwards89

I'm horrible at catching sarcasm over the net, sooo If that wasn't sarcastic, then... Thanks :D I really need to fix this, so I thought a video would be best!

Not sarcasm... I was serious... that was a great explanation of a problem... when we hear so often "this one thing makes a funny noise and it don't work" as a description.

If we had an award for the best explanation for a problem I'd nominate you.

hedwards89 · Jul 11, 2013, 05:53 PM

The fan in squirrel cage spins freely I just checked, It's really easy to turn

smoothy · Jul 11, 2013, 06:01 PM

Originally Posted by hedwards89

The fan in squirrel cage spins freely I just checked, It's really easy to turn

Bearings are good then...

Hoping Startmando has some ideas... I'm more of an automotive A/C guy and not as familiar with the hardware controls on these... and I know the Trane better as that's what I have.

hedwards89 · Jul 11, 2013, 06:06 PM

I take it that's a good thing, lol

hedwards89 · Jul 11, 2013, 06:07 PM

I'm going to go find this coil access panel real quick

smoothy · Jul 11, 2013, 06:16 PM

Originally Posted by hedwards89

I take it that's a good thing, lol

Not sure... I've got a gut feeling about a motor with some damaged windings from overheating... but not nearly familiar enough with that to have enough to back it up.

But If that's a stepper type motor it might be the control board instead. (with that cap I'm guessing its not)

Honestly don't know that a capacitor could cause that sort of thing or not... haven't seen the situation personally enough...

I'm a Degreed Electronic Engineer by trade... got licensed for Automotive A/C stuff for the Antique cars I restore as a hobby. Actually lots of overlap...

Hoping Stratmando or someone else can say more.

hedwards89 · Jul 11, 2013, 06:52 PM

A/C Reference video - YouTube

Here's a video for referance on what I accomplished by what you guys told me to check

smoothy · Jul 11, 2013, 07:01 PM

The condensation will be normal... thats the part that gets cold when its running... and like a cold beer... moisture in the air will condense. That's where the water that drips outside or into a drain comes from.

You at least HAVE an access panel... mine didn't.

DO you have a small mirror you can shine a light through one side and see out the other... as in left to right or right to left.

Looking for crud buildup that would be on the INSIDE of that.. as airflow if from the bottom of the unit upwards.

There are sprays that you can use to clean that... if there is a mat of crud.

But that's not the primary problem... but it will however restrict airflow if its matted up..

hedwards89 · Jul 11, 2013, 07:06 PM

I think I have an inspection mirror. I'll go check the shop for one.

hedwards89 · Jul 11, 2013, 07:23 PM

No noticeably bad build-up on the underside of the coils.

smoothy · Jul 11, 2013, 07:36 PM

Originally Posted by hedwards89

No noticeably bad build-up on the underside of the coils.

Good... one less thing to worry about.

Getting to the point we need someone with more specific experience than I've got to take you the rest of the way...

Stratmando · Jul 12, 2013, 05:49 AM

May have a bad capacitor, or motor?
Would try capacitor first.
Look for numbers like 15uF, 370 Volts on the capacitor, and get the replacement.
Good Luck.
Be sure power is off.

hedwards89 · Jul 15, 2013, 05:08 PM

Tried the Cap - N/H, still have the same problem.. Most likely have a burnt up motor... I will try that when I get the cash.. Any good sites for these HVAC parts?