Question about Bryant 462AJC021BA Air Conditioner

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We have a Bryant unit and the air compessor outside still runs when the airhandler shuts off.

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This could be one of many problems which could include a contactor malfunction, thermostat malfunction or some type of short in the control circuit.
Unless you are comfortable with electricity and the use of a multimeter and wiring diagrams/schematics, I suggest you call a professional regarding this issue.

Posted on Aug 26, 2010

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Posted on Jan 02, 2017

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2 Answers

2002 4 ton Bryant air conditioner shuts off, fan still runs but not cooling is problem in the controls in the attic or in the AC unit or both?


With a non heat pump it is a simple 24 volt AC control circuit. In the attic there is a relay that is actuated via the fan control wire directly from the thermostat. On the thermostat there is an auto/man switch that controls the fan. Manual the fan runs all the time. Auto fan turns on and off with the outside compressor.

If the system is not calling for cool and the fan continues to run the fan relay is sticking. common problem. Sometimes after running for several days the relay will stop sticking if not, replace relay.

If the system is calling for cool and the compressor stops I would still expect the fan to run until thermostat tells the A/C to off. Some compressor units include a safety switch or high-pressure cut-out switch A blocked internal valve bad control board or external fan in outside unit defective no air flow in outside unit.
High pressure cut out not good,

Suggest turning temp max cool and observe. If acceptable cool and the compressor runs without interruption all is good, except for the blower in the attic. Safely check relay in attic blower circuit.

Hope this helps.

thermostat-heat-cool-fan-on-czwsw2ci0layswcsyy3dj4dr-4-2.jpg

basic-thermostat-wiring-diagram-czwsw2ci0layswcsyy3dj4dr-4-5.jpg

Jun 28, 2017 | Bryant Heating & Cooling

1 Answer

Heat pump troubleshooting


check the two outside lines and see if there is a difference in temperture. it may be only outside fan running.

Aug 29, 2013 | Bryant Heating & Cooling

1 Answer

Airhandler in attic runs but blows little air


Hello, replace the capacitor to the motor, sound like it may be weak.

Jun 12, 2012 | Ruud Heating & Cooling

1 Answer

Ac units in apt. is fully charged,but it blows cool to cold air and will constantly run all day with out shutting off. at night when it cools off outside it will run like its supposed to. the fan unit...


Your ac thermostat is defective and not switching off the compressor resulting in excess cooling and need replacement. Also ensure that all doors and windows are closed. Could be some window is opened behind the curtain without your knowledge. That could be yet another reason for your unit continuously running.
Finally check your relay unit and this should solve your problem!

Jul 10, 2009 | Heating & Cooling

1 Answer

Bryant central air unit fan doesn't stop.


This is a condenser fan and as long as the A/c unit is in cool mode, this fan will run. The only time it should shut off is when temperature setting is satified and the unit shuts off.

Jun 03, 2009 | Heating & Cooling

1 Answer

2 to goodman ac unit model a24-08


Replace the fan relay switch in the airhandler(inside unit).

May 19, 2009 | Goodman Heating & Cooling

1 Answer

Condenser unit will not come on


Replace the starter capacitor.

Apr 27, 2009 | Bryant Heating & Cooling

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