When i turn the a/c on the inside furnace motor runs but the outside compressor units does not. the compressor is a janitrol, about 20 years old

The relay for the motor is stuck or the points inside the relay are arced closed. Replace the relay.

is green wire from thermostat or from outdoor. retrace and change as needed. If not Goodman has a tech support number you can call while looking at unit.

IT SOUNDS LIKE YOU HAVE A BAD MOTOR OR CAPACITOR.

I had the same problem,if you do not monitor that you will make matters worst and burn the Compressor.your problem is the blower unit it has three speed sometimes four.it needs to be changed..

flushing out water lines do you mean condensate line coming off the furnace that drain to the outside. is the condensing unit outside running when u have it in cooling mode. by condensing unit I mean the unit outside that has lines that run to the inside. does that turn on when u have it in cooling. the unit outside have two components that should turn on the outdoor condenser fan and a compressor.

It sounds like the unit may be over charged. Make sure the outside coils are clean and you have plenty of airflow coming out of the top of the outside unit. What could be happening is, when the temps get higher outside, so do the pressures in the system. The compressor has a thermal overload protection that will kick the compressor off if it gets to hot, which if the compressor is over charged, it will work twice as hard, over heat and shut off. You would need a technician to come out and get the refrigerant charge back to normal. Another thing that could be happening is a weak or faulty capacitor, which is a small round or oval metal object, found in the electrical compartment on the unit. This are fairly simple to change out if your comfortable with electric. I've also had to put what's called a hard start kit on compressors with the same problem, new and old. The hard start basically gives it that extra boost of power to get it up and going. I would start with the refrigerant charge and go from there. The electrical "humming" sound that you hear unless you turn the breaker to the furnace off, is the contactor on the outside unit having a call for cooling. The 24 volts come from the furnace, to the outside unit, and pulls the contactor in to power the unit with the 220 volts supplied. It is normal and you don't have to worry about that at all. I hope some of this helps and good luck!

compressor or condenseur fan is ground

Start the unit and go outside to see if the insulated pipe is sweating or cold, hot air should be discharging from top of outside unit. Since the breaker is not tripping, my best guess is the compressor is not operating. You might have to replace the capacitor.

If you can hear the compressor operating, then most
likely needs refrigerant

two things to try first to get you pointed in the right direction. First disconnect the R or RH wire from the T-Stat. If the furnace turns off (Stops firing w/ fan to turn offabout 90 sec. later) then you more than likely have a bad Thermistat. If it continues to run Pull the R wire from the Furnace circuit board. put door back on furnace if it stops you have a short in the wire. Still Running? Most likely a bad curcuit board. Hope this helps.

Whats the amp breaker? Is this for the inside unit or the outside condenser? If the inside and gas heat you have a bad fan motor, If its an electric furnace , the same, but if its the outside unit, the fan could be going bad, locking up and the compressor still runs and pulls high ampsand tripps breaker or the compressor is just pulling too many amps due to plugged coils with dirt , grass or weeds blocking airflow.([email protected])