AC kicks on, blower runs for 30 seconds only - http://www.hvacmechanic.com/ Forums
Original message
| miker789
 |  "AC kicks on, blower runs for 30 seconds only"
, posted Wed 4 Jun 23:06  
Bought house 2 years ago, heat and AC working fine.
Goodman GMNT 100-4 model. Installed Feb of 2004. AC unit looks to be older and no manuals or info given.
Just this week ran AC for first time for summer. Worked first day, then after that would not run very long. Looked at it tonight. Vertical unit, air flow is up. The evaporator unit is at the top, the squirrel cage fan is at the bottom. Whoever installed this furnace did not do a good job. The evaporator was just set on top with no anchors. Over time it has slid and most likely bent the sheet metal around the edge. The low edge of the drip tray is now opposite the drain pipe.
The first day this week that I ran it, the water ran down into the bottom and got into the squirrel cage fan. After listening closely, I finally realized I was hearing water swishing when the fan ran.
Shut down everything. Pulled the fan out and it had about 1/4 to 1/2 inch of water. Drained it put it all back together.
Set the thermostat to Cool and low temp. The compressor kicks in, then the blower starts. It runs about 30 seconds and the blower stops. The compressor keeps running. If I keep waiting, about 4-5 minutes later the cycle repeats and keeps repeating.
The red status light on the circuit board stays on solid the entire time.
I am not a HVAC guy, just a very smart guy who reads manuals to figure stuff out. This one has me stumped. Would greatly appreciate any help. Going to be 90s the next three days. Gotta have AC or my wife will shoot me.
Thanks!
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Replies:
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| "Re(1):AC kicks on, blower runs for 30 seconds" , posted Thu 5 Jun 20:43
Well it sounds like water damage to me. Either the board, which supplies power to the motor is bad, or the motor itself is bad.
Check for 120V to the motor from the board. Test the capacitor.
www.hvactechgroup.com
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