A/C and heating come on or turn off while in the on mode?

Tiny
JIML3
  • MEMBER
  • 2009 KIA SPECTRA
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
A/C and Heating are intermittent. Sometimes when hitting a bump, the A/C or heat will either turn off or come back on when it is in the run mode.
Saturday, February 8th, 2025 AT 11:13 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
This is coming when the blower motor starts to go out. Here is the location so you can change it out which should fix the problem. Check out the images (below). Let us know if you need anything else.
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Sunday, February 9th, 2025 AT 9:45 AM
Tiny
JIML3
  • MEMBER
  • 2 POSTS
I read the answer however the fan motor functions properly. To me it acts like a poor ground, bad coil in the relay or a bare wire grounding out. I really need a wiring diagram so that I can trace the wires. I have not been able to find any. Do you know where I can find one for my vehicle? My problem is that the diagrams I find are not for the 2009 Kia Spectra EX but for different models.
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Sunday, February 9th, 2025 AT 12:48 PM
Tiny
KEN L
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  • 54,137 POSTS
Okay, here is a guide to help you test the blower motor power and ground with the wiring diagrams in the images below.

https://www.2carpros.com/articles/how-to-test-an-automotive-hvac-system-blower-fan-motor-a-detailed

So, it is the blower that stopped working, correct? Check out the images (below). Please let us know what happens.

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Monday, February 10th, 2025 AT 9:46 AM
Tiny
JIML3
  • MEMBER
  • 2 POSTS
No, the blower motor runs correctly. While the blower motor is working either the heat or cooling stops while the blower is running.
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Monday, February 10th, 2025 AT 3:21 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Please start a new thread.
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Tuesday, February 11th, 2025 AT 10:12 AM

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