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Blower goes off and on

Tiny
CHEMALURGY
  • MEMBER
  • 2004 KIA SPECTRA
  • 4 CYL
  • 152,000 MILES
The blower fan goes off and on, but mainly off. The compressor is working fine. Sometimes when accelerating from a stop, the belt squeals, but it is on tight.
Friday, June 29th, 2018 AT 11:05 PM

6 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hi there, I am Danny.

Just a quick question. Do you mean the blower motor inside the car is shutting off/not blowing air through the vents inside the car?
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Friday, June 29th, 2018 AT 11:15 PM
Tiny
CHEMALURGY
  • MEMBER
  • 5 POSTS
Yes. It alternates between blowing and not blowing when the switch is turned on. The compressor is working fine and it is cold when it blows. Our just will not stay on and that is if it even comes on. I have also noticed that the belt well squeal. I took it to a mechanic who tightened the belt, and it worked for a couple of days after, but not long.
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Saturday, June 30th, 2018 AT 12:15 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, Danny here.
Another question. When it is working- on the switch do the different fan speeds work? Danny-
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Saturday, June 30th, 2018 AT 1:35 PM
Tiny
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  • MEMBER
  • 5 POSTS
The blower works intermittently. I have noticed that it works more often at high speeds and will shut off while idling, but as with everything, that is not always the case. As for the difference if it is on high or low settings, I think it is better on high.
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Saturday, June 30th, 2018 AT 10:16 PM
Tiny
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  • MEMBER
  • 5 POSTS
The A/C came on for a short while today and I checked if it was affected by which fan speed was selected. It was not. I am really hoping this is something simple to repair.
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Sunday, July 1st, 2018 AT 9:11 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, Danny again.

You might be having a problem with the blower motor resistor. It could be loose, melted/bad connection. I am attaching a test guide and component picture if you want to test. It is located on the bottom of the HVAC unit under the dash on passenger side. Hope this helps and let me know if you have any further questions.
Danny-
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Monday, July 2nd, 2018 AT 2:30 AM

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