Question about Bryant 463AAC008BA Air Conditioner

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I've a Bryant AC/Heat system. Model 661CJ030-A. It run cool okay but the fan kept to running even get to the point that has been set.The system seemed not auto stop. Any ideas,

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Hi if the indoor fan continues to run after the unit is done cooling, you either have a fan relay located in the indoor unit that is bad or stuck, or a problem in the thermostat with the fan contacts not opening when its satisfied. Pull the cover from the thermostat to expose the wiring. Find the G/Green wire. This is the fan wire. Take a small screw driver and carefully loosen screw and take this wire off. Give it a couple of minutes to see if it shuts off. If it does shut off, the thermostat is faulty and you will need a new one. If it still runs, you will have to check the indoor unit and find the fan relay. If this system is gas fired for heat, it will have a combination fan/High limit control that is the problem, more then likely stuck. Look at the wiring diagram on the panel and it will show you the fan control. You can try tapping on it to see if you can un- stick it. If not, it will need to be replaced. If its just a fan relay, it will be black about the size of a wooded match box with around 5 wire terminals on it. If you have someone turn the stat on and you should be able to hear it click. Do the checks with the stat and let me no the out come and we can go from there.

Posted on Jun 04, 2010


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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.

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I think you are talking about the outdoor unit so see if you can hear the compressor running. If it isn't running then set the thermostat so that the unit is not running and give the pressure time to come down.(15mins-30mins) Discharge pressure will build up if the fan isn't running and cause the compressor to shut down that's the reason for doing this. After this set the thermostat to call for a/c then see if the compressor is running. If it isn't first check your circuit breaker or disconnect or fuses. One of these should be located close to the outdoor unit. If you have power and it's not running then look at the contactor to see if it is pulled in. The contactor supplies both the fan and compressor. After that then check you capacitor. Some use a double capacitor that works the fan and the compressor. Let me know what you find

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