Compressor fan spins at low speed

Window AC units normally have two motors. One motor spins both the inside and outside fans. This motor may be PSC (permanent split capacitor) with a run-capacitor. Test the capacitor or just replace it if it is old and you don't have test meter(s). The other motor is inside the sealed compressor unit. This will be overheating if the first motor was not running at full speed due to a failing run capacitor. The thermal check will auto-reset but the compressor motor most likely cannot start until it is cooled completely down by being turned off for an hour or more. There is also a run capacitor on the compressor motor. Test and/or replace. If this does not correct the problem I do not recommend further repairs as most window units are cheaper to replace -- labor will be high on changing a compressor, fan motor, or coils and expansion valves.

I have omitted advise about cleaning coils and fans and filters, but if you find a lot of dirty build-up then clean those first before moving on to motor issues.

If that fan stopped your compressor overheated, shut off on thermal overload. Carefully cool compressor with water hose and restart. If the big copper is cold ,small copper warm, compressor is running. Check capacitor on compressor

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Either the condenser fan has bad bearings, or it has a defective fan capacitor.
Turn off the breaker to the outside unit.
Spin the fan blade by hand.
If the fan blade spins easily and will spin a few revolutions with no problem the fan bearings are good.
If not, replace the fan motor due to bad bearings.
I am pretty sure you fan motor is bad because with a bad capacitor the fan motor will not get up to speed and may just sit and overheat.
I'm leaning toward a bad fan motor.

correct my did the same thing replace the switch

You need to replace the fan capacitor. Your compressor is probably in thermal overload you can cure this by turning off the disconnect your ac voltage and taking a cool water hose and running over the top of the compressor for a while. Then turn your disconnect back on and listen and feel of the big copper line to see if it gets cold and also listen to see if the compressor kicks on.

Your capacitor is definitely the culprit here.
It should be a dual capacitor. Meaning it has 3 terminals on one capacitor. "C" "H" and "F" would be the markings for power in,"C" out to fan "F" and out to compressor "H".
It also has a mfd(microfarad) value on the capacitor as well as a VAC rating of 370 or 440 volts ac. A 440 VAC can be used in place of a 370vac.
The other specs may be something like 40/5 or 35/5 or 40/7.5 etc.
The capacitor replacement should be exact as far as the microfarad rating is concerned.( eg. 40+5).
The money requested through various sites is just that....various. These dual caps may sell around 30-50 dollars for a quality capacitor. If you wish to spend the $118 I will sell you all as many as you would like.

Shut the power off to the unit, spin the fan blade to see if it spins freely. If it doesn't spin freely, (there appears to be a little drag when you spin it),the bearings are bad, if it does spin freely, then try moving the motor shaft from side to side if there’s any play in the shaft side to side then the bearings are worn and motor needs replaced. Then, check the capacitor, if it’s bulging even slightly, the capacitor is bad and needs replaced. Most of the time people replace the capacitor if motor seems ok. If capacitor is ok, turn power on to see if the motor is getting the proper voltage, if it is and not trying to run, then the windings are probably open, the motor's bad and needs replaced.

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of
tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

there are 3 possiblities 

1. something obstructing the lower fan motor (or exhaust motor)
2. bad fan capacitor
3. or bad motor

to check any of these you will need to disassemble the unit to get to the blower. there are several screws located at various points on the plastic housing covering the unit. Once removed you should be able to check for motor obstructions visually. for checking the motor and capacitor you will need a volt/ohm meter and ideally a capacitor checker. you could try to spin start the motor while it is powered up this could be a possible sign of a bad capacitor if it will start when you do this or if the motor will spin freely while powered down and will not spin start when powered up. I know that is kind of confusing but its how they work. GO FIGURE.  thanks Peyton