No cold air-ac fan runs non stop


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Old 04-29-09, 09:39 AM
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No cold air-ac fan runs non stop

I have a Carrier Weathermaker SX. I'm not sure how old it is, but I believe it is over 10 years old. The basic problem is that I am getting no COLD air, only COOLISH to WARM, and this air only flows when the unit is turned off, and very slowly at that; every time I flip the tstat switch to "cold" (no matter what position the fan switch is in-either "on", or "auto") the circuit trips. When the tstat switch is in the "off" position, the ouside fan on the compressor unit runs continuously but at a slow and steady pace and with a buzzing sound. However, when I turn the AC unit on (flip the tstat switch to "cold"), the circuit blows, and the air stops, along with the outside fan . I can also make this happen by tripping the circuit manually. ALL THE WHILE, THE COMPRESSOR NEVER KICKS IN AT ALL. When I turn off the unit and re-set the circuit, the outside fan starts blowing again (slowly) and the coolish air comes back.

So, I decieded to check on some of the wires. Here are the scenarios:
1. When I disconnect the YELLOW wire from the Coil
to the Capacitor, the outside fan stays on for a
few moments, then shuts down, and I hear a buzz.
I think this is normal, though, being that the CAP
holds a charge for a while, Right?
2. When I disconnect the BROWN wire from the CAP
to the OFM, the fan SLOWS to a stop at a very
steady rate, and the buzz is still present.
3. When I disconnect the BLACK wire from the Coil to
the OFM, the fan shuts off right away. the Buzz is
still there.
4. When I disconnect the BLACK wire from the Coil to
the STARTER RELAY, the fan stays on, BUT the BUZZ
goes away.
5. When I disconnect the following wires from the COIL to
the COMPRESSOR:
a. YELLOW WIRE-fan stays on.
b. BLACK WIRE - fan shuts off. HOWEVER,
with this wire disconnected,
if I turn the TSTAT switch to
"COLD", the Fan turns back
on, but at a very FAST RATE
(the speed at which it runs
when the compressor turns
on), but the compressor
never does kick on.
Does all of this sound like the Compressor is pulling too many amps? Like the compressor CAP needs replaced? should I try a hard start kit? Any advice would be great.

 

Last edited by wolfie031; 04-29-09 at 09:44 AM. Reason: I GAVE WRONG ANSWER ON # 4 (STARTER RELAY)
  #2  
Old 04-29-09, 09:45 AM
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Sounds like a grounded comoressor to me, chk the comp terminals to ground
 
  #3  
Old 04-29-09, 10:49 AM
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Thanks! I'll give it a try.
 
 

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