Blower fan speeds?

ORYNOCO

MEMBER
2003 HYUNDAI TIBURON
2.7L
V6
2WD
MANUAL
78,000 MILES

The A/C only cools when the fan speed is at lower setting (1 and 2). Once I turn the setting to 3 or 4 the fan still blows air but A/C light goes off and the air is no longer cold.

Monday, May 27th, 2019 AT 11:12 PM

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

This is almost surely the control module. I am attaching the process below on how to replace this.

However, if you want to confirm this I attached the wiring diagram and we need to monitor the voltage from the control module on the blower feed back and then on the A/C output. You will see that the voltage will go away on the A/C output circuit when you switch the fan to high.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

Take a look at the attachments below and let us know what questions you have. Thanks

Image (Click to make bigger)