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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22636
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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My Tempstar condenser, model nac024akc3, has stopped working.

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My Tempstar condenser, model nac024akc3, has stopped working. I can hear the relay in the unit call when the thermostat requests cooling. Can you help me identify what component needs to be replaced?

Hello, my name is Billy.

Do you have a voltmeter?


Customer: replied 4 years ago.
Yes, let me grab it
We need to check the 2 main hot wires coming into the unit.

We need meter set for av volts~ we need to measure hot to hot.

Tell me result

Customer: replied 4 years ago.
239 volts

Now..are you familiar with the contactor that closes to send power on through?

Customer: replied 4 years ago.
I see it right above the incoming lines. It has a small spring. When I manually depress, it makes sound and sparks, but the fan doesn't start.
Ok thank you hear the compressor start and just not the fan or neither starts?

Customer: replied 4 years ago.
I think I hear the compressor, certainly not the fan.

I want to turn the thermostat to cool to engage that contactor on its own.

Then I want you to manually spin the fan blade. Tell me if the fan starts trying to run or if it just spins and stops..


Customer: replied 4 years ago.
Let me pull the disconnect, then the fan cover, then reconnect. Don't want to lose a hand.
you can use a ruler or stick...we just want to manually spin it while it has power

Customer: replied 4 years ago.
Worked when I pushed the blades. Fan is spinning
Thank you...good news...

You have a bad capacitor

You can get one online or from any local cooling shop. On the side of the capacitor will be values like 7.5mfd (Uf) or 5mfd. If 3 sets of terminals on top it will have 2 numbers like 35mfd/5mfd.

mfd = microfarads

Get this capacitor (less than $40) and replace with wires in correct spot. Then you will be all set.


Customer: replied 4 years ago.
Thanks. I'll get one tomorrow.
I was not trying to be silly by saying "good"....what I meant is that this is a lot cheaper and easier than changing a motor.

Many change the motor and end up in the same spot. The cap helps start the motor...that is why it started when you spun it.

I thank you for the hands on and your patience.


Customer: replied 4 years ago.
The fan has been running, but it doesn't seem like the compressor is running. Will the new capacitor solve that as well?
Yes. Unfortunately we cant hand spin the comprressor.

The capacitor will solve both.


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