Question about 2001 Hyundai Elantra

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Heater & ac

My heater and ac only blow out when i put the knob between 1 and 2 otherwise it wont blow at all . any suggestions

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This is usually a bad blower motor resistor. It is usually where your blower motor is and it could be behind or under your glove box.

Posted on Jan 23, 2009

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1 Answer

Driver side blows heat , pass blow cold on ac


I would suggest you work from a factory
diagnostic manuals,I wouldn't even go to the vehicle
the first time, without info on any system or problem
All your saying is your not familar with the system & you
you can't be,you need your reference material & wiring
diagrams each & every time, so you have somewhere
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My 2003 Altima, 3.5 has intermittent issues with the Heat/AC fan. At times it won't blow at all and at times it will only blow very lightly no matter what the setting. Again, this is not a constant...


sounds like you have a bad heater control module. simply put, the knob where you turn the fan on,,, that part is bad and needs replaced. hope this helps you!!

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Heater/AC vent option knob produces knocking sound in back right corner. i.e. the knob rotates from vents in front to half front half floor to all floor to half floor half defrost to all defrost. the...


If I am reading correctly you are hearing the vent doors moving to redirect the airflow to the vents you choose. This is normal and can be more noticeable if the blower fan is on, putting air pressure against the doors.

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2005 RX8 heater is blowing cold air. Fluids are topped up.


You need to repair the heater core with a soldering gun.

If you do not have heat, or only have heat, IMHO it is most likey the AC/heater control unit. This is the part which has the AC/heat control buttons and knobs.

Easy Diagnosis:
The easiest way to verify this is to turn on the radio, press and hold the power on/off button and press and hold the scan-up button for a second (full second). The word "A/C TEMP" should appear on the left of the display and a number from 0 to 16 on the right. I suspect yours will have the number 0 (or 16 if heating only problem) displayed no matter where you turn the temperature control knob. If this is the case you could turn the temp. knob to full heat and see if it goes to 16 after pushing down or to the right on the knob.
In a working system, the number moves evenly in increments of 1, from 0 to 16 as you turn the temperature knob.

Easy Fix:
I was able to take mine out and solder 3 loose connections to fix it.

The beginning steps are the same as for any radio removal procedure and check for loose connections.

Dec 14, 2009 | 2005 Mazda RX-8

1 Answer

Heater/AC control no longer allows change in temperature


You have one of two possible problems.

1) The temperature shaft retention nut is loose behind the knob

2.) The wires to the potentiometer part of the temperature may be broken.

Either one is common to this vehicle. The replacement of the AC controller is about 900 dollars. If the wires are broken, they can easily be reattached to the circuit board via soldering. What you would have to do is remove the control box from the dash, and disassemble it. Once the unit is apart, there are 3 wires from the temp knob to the circuit board that need to be re-soldered. The unit CAN be repaired, as opposed to the expense of replacing it.

Apr 23, 2009 | 2006 Toyota Highlander

2 Answers

Heater


Try spinning the knob real fast in either direction. Sounds stupid but it worked for me.

Sep 27, 2008 | 2005 Chevrolet Malibu

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