Question about Carrier 38CKC036 Air Conditioner

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Carrier 38tkb not working, but furnace is blowing

Hello i have Carrier Weathermaker 38tkb air conditioner unit. It's about 6 years old and when i got home today, the unit itself wasn't working. Although the blower fan in the furnace inside was blowing, the fan on the a/c unit outside was not moving. I can hear a humming sound coming from it and once in a while, you hear it trying to kick in (the lights in the house even dim a bit, which is unusual), but it never kicks in. The top center of the unit is extremely hot to the touch. I've checked the circuit breakers and even the pull out on/off switch on the box outside next to the unit and everything seems fine. Any help would be immensely appreciated ?
Thank you
Claudio

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  • Claudio Santos Jul 07, 2010

    Thank you 'wise_jf', that was extremely helpful and solved the problem. Couldn't find actual replacement part locally, but got an universal at a local HVAC supply store that they setup for me with the same specification for less than $30. Everything is now working back to normal. You just saved me a ton, and helped keep my family (mainly my 1 and 7 yr olds), cool. I love this site. :o)

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It is probably a capacitor problem. Check inside the outside unit. you will see a round cylinder with three groups of terminals on top. If the top of it is dome shaped it probably needs to be replaced. You can check it if you have a microfared tester. However if it is poofed out it probably is bad. If this is not the problem you will probably have to replace the fan motor.

Posted on Jul 07, 2010

Testimonial: "Thank you 'wise_jf', that was extremely helpful and solved the problem. Couldn't find actual replacement part locally, but got an universal at a local HVAC supply store that they setup for me with the same specification for less than $30. Everything is now working back to normal. You just saved me a ton, and helped keep my family (mainly my 1 and 7 yr olds), cool. I love this site. :o)"

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Posted on Jan 02, 2017

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SOURCE: Hello i have Carrier Weathermaker 38tkb air

The humming noise and dimming of the lights is an indication something in the outdoor unit is locked up or has failed.

Check the capacitor as it may have gone bad. If the capacitor is good, then you either have a failed motor, a failed compressor, or both.


Posted on Jul 07, 2010

Testimonial: "Thank you 'veterantech', that was extremely helpful and solved the problem. It was the capacitor. Couldn't find actual replacement part locally, but got an universal at a local HVAC supply store that they setup for me with the same specifications for less than $30. Everything is now working back to normal. You just saved me a ton, and helped keep my family (mainly my 1 and 7 yr olds), cool in this 100% heatwave we're getting here in the northeast. I love this site. :o)"

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