Question about Hyundai Sonata

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This is an ongoing issue. 1999 Hyundai blower for A/c and heater. Last year removed the resistor from the top of the Blower housing. This was also advised in a recent question. Got along all winter with the Blower on High only. The blower has stopped working on High now too. Sometimes after tapping on the blower motor to get it going, I could get the blower going again (only on high) by moving the dash board speed control switch. So do we think the switch is also bad, because I replaced the blower and nothing, not even on high.

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  • Rebecca Meyers May 28, 2010

    OK, thanks for the answer, however I knew the resistor was bad, as I had removed it last fall. I have replaced the blower and the resistor. Now I have air (blower) on low and medium only. When the switch is moved to #3 position, a noise comes from under the dash...kind of a slow squeak, (my grandson says it sounds like an animal dying). The A/C light indicator kind of dims (sometimes) when I move the switch to #3. When I move it to #4 absolutely nothing. Nothing I have indicated doing is affecting the compressor, it is running and running well. It is just the blower that is giving me fits. I have also checked the fan fuse in the engine cabin, it is fine. What next?

  • Rebecca Meyers May 28, 2010

    Thank you for your help. Replacing the switch now. Have blower on 1 and 2 and 3 sometimes. Will avoid using as much as possible until new switch gets here. Thanks again.

  • Rebecca Meyers May 28, 2010

    I have replaced the fan motor resistor. Flat panel hanging inside the blower duct. Also new blower motor. Am working on new switch. What about the Blower Relay? I just realized there is a Resistor and a Relay.

    After installing the new blower, I had air on 1 and 2. Pulled the dash console apart and moving the back of the switch 3 came on. Do we agree it is time for a new switch, or should I change the blower relay? If it is the relay, where is this? Have the glove box out, but do not see a relay (black squarish plug with wires running to it?)

    Thanks!


  • Rebecca Meyers May 28, 2010

    If the plug that attaches to the back of the switch is slightly brown in some of the connectors, do I replace the whole plug?

    I do not have a new switch and am having a really hard time finding one. What would the fan speed switch be called? A Temperature control module? Any suggestions on where to find this? If this is what it is called.

    Thanks again!


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  • Hyundai Master
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I WOULD REPLACE THE BLOWER MOTOR RESISTOR AGAIN AND THE DASH SWITCH, THEY ARE ALMOST CERTAINLY BOTH DAMAGED BY HEAT. WHEN A BLOWER MOTOR STARTS TO FAIL IT DRAWS EXCESSIVE CURRENT AND BURNS OUT THE SWITCH AND DAMAGES THE SPEED CONTROL RESISTOR, ASLO CHECK FOR ANY BURNT CONNECTORS TO THE SWITHCH, THE BLOWER MOTOR OR THE BLOWER MOTOR SPEED CONTRL RESISTOR

Posted on May 28, 2010

  • yadayada
    yadayada May 28, 2010

    I can't emphasize enough how important it is to correct any burnt connectors or wiring, this condition causes allot of resistance in the blower motor circuit and this will destroy the new switch very quickly along with the blower motor resistor again.

  • yadayada
    yadayada May 29, 2010

    yes change the relay as well.

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  • Master
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The problem lies in the fan speed resistor. The resistor is located either in the housing for the fan motor or in the ducting near it so the fan can blow over the resistor and help to keep it cool. If it only worked on high, this is the most common symptom and the fact that it finally went out, well, it was only a matter of time. The one for automatic climate control runs about $110 and for manual $45.

Posted on May 27, 2010

  • 1 more comment 
  • Rebecca Meyers May 28, 2010

    OK, thanks for the answer, however I knew the resistor was bad, as I had removed it last fall. I have replaced the blower and the resistor. Now I have air (blower) on low and medium only. When the switch is moved to #3 position, a noise comes from under the dash...kind of a slow squeak, (my grandson says it sounds like an animal dying). The A/C light indicator kind of dims (sometimes) when I move the switch to #3. When I move it to #4 absolutely nothing. Nothing I have indicated doing is affecting the compressor, it is running and running well. It is just the blower that is giving me fits. I have also checked the fan fuse in the engine cabin, it is fine. What next?

  • Kori Policy
    Kori Policy May 28, 2010

    A slow squeek is in line with the fan going out again. These were not exactly the best of quality when they were made. Replace the blower motor again. I know that's not what you want to hear.

  • Kori Policy
    Kori Policy May 31, 2010

    Replace the blower motor again and while it is out, bench test it by hooking it up to straight voltage(this will not hurt it). If it makes noise, replace it. If it still will not work on any other settings, replace that ballast again(fan speed controller). If you need to get the head unit, check local salvage yards and save yourself some money, in fact they mave have all of the parts.

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1 Answer

How to change blower motor in. 99 grand Cherokee


Check this procedure...Blower Motor Resistor and Controller Replacement


REMOVAL

1. Disconnect and isolate the batten' negative cable.

2. Depress locking tab and unplug the wire harness connector from the blower motor

resistor or controller (power module).

3. Depress locking tab and unplug the resistor or controller connector from the blower

motor.

4. Remove the 2 screws that secure the blower motor resistor or controller to the

heater-AC housing.

5. Remove the blower motor resistor or controller from the heater AC housing.


INSTALLATION

1. Install the blower motor resistor or controller to the heater AC housing. The

housing is indexed to allow (controller power module) mounting in only one

position. Tighten the mounting screws to 2.2 Nm(20 in. Lbs.).

2. Plug in the wire harness connector to the blower motor resistor or controller.

3. Plug in the connector from the blower motor resistor or controller to the blower

motor.

4. Connect the batten' negative cable.

zjlimited_1958.jpg


Hope this helps (rerember to rating this and leave a testiomonial).

Sep 30, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Need to locate the motor blower resistor for my 1999 mercury mountaineer, it has dual air, the resistor for the back is fine but the one in the front is bad and i cannot locate it. Please help.


If you have a manual system, you have a resistor. If electronic, you have a blower motor speed controller. Please rate if this helps.

here is info:

Control System Outputs-Manual A/C
Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:
  • The assembly is located on the evaporator housing in the engine compartment.
  • Three resistance elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.
Control System Outputs-EATC
Blower Motor Speed Control
The blower speed control is located on the evaporator housing in the engine compartment.
  • The function of the blower motor speed control is to convert low power signals from the electronic automatic temperature control module to a high current, variable ground feed for the blower motor (18527).
  • The blower motor speed is infinitely variable and is controlled by the electronic automatic temperature control module software.
  • A delay function provides a gradual increase or decrease in blower motor speed under all conditions.

Jan 10, 2011 | 1999 Mercury Mountaineer

1 Answer

How do i change blower motor resistor on 99 jeep grand cherokee


Welcome to FIxYa.com



Blower Motor Resistor and Controller Replacement

Image Blower Motor Resistor Or Controller/Power Module Remove/Install

REMOVAL

1. Disconnect and isolate the batten' negative cable.

2. Depress locking tab and unplug the wire harness connector from the blower motor

resistor or controller (power module).

3. Depress locking tab and unplug the resistor or controller connector from the blower

motor.

4. Remove the 2 screws that secure the blower motor resistor or controller to the

heater-AC housing.

5. Remove the blower motor resistor or controller from the heater AC housing.

INSTALLATION

1. Install the blower motor resistor or controller to the heater AC housing. The

housing is indexed to allow (controller power module) mounting in only one

position. Tighten the mounting screws to 2.2 Nm(20 in. Lbs.).

2. Plug in the wire harness connector to the blower motor resistor or controller.

3. Plug in the connector from the blower motor resistor or controller to the blower

motor.

4. Connect the batten' negative cable.

leedavidian_45.jpg



Thank you for using FixYa.com

Regards, Lee Davidian

Nov 22, 2010 | 1999 Jeep Grand Cherokee

3 Answers

Blower motor resistor, where is it located/


It will be up under the dash on the passenger side near the blower motor. It will have 5 or six wires in its connector

Nov 10, 2010 | 2000 Jeep Grand Cherokee

3 Answers

Heater fan only works on high why would that be?


Blower motor resistors are shot or the switch is bad.
In high speed blower motor gets Direct B+, it doesn't go threw the resistors.

Jun 11, 2010 | 2001 Dodge Dakota

2 Answers

Heater blower on van won't come on. Already replaced heater blower and checked fuses.


Check blower motor resistor make sure none of the spring's are broken, resistor sit next to blower motor in housing, also check blower motor relay for voltage, also sit over by blower motor outside of housing and last check voltage at blower motor switch.Hope this was very helpful,good luck.

Mar 25, 2010 | 1989 Chevrolet Astro Cargo

1 Answer

1999 grand marquis were the blower motor resistor is located


this is for manual heater system. If you have electronic (digital display) you don't have one. Instead you have a blower motor speed controller.

here is info

Control System Outputs—Manual A/C
Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing toward the center of the vehicle.
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.

Dec 12, 2009 | 1999 Mercury Villager

2 Answers

1999 chevy silverado heat/air blower only works on high speed


little black box to the left of blower motor (2) 7/32 screws holding it heater box with a plug with 7or 8 wires feeding it the plug is probably going to be melted inside

Aug 05, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

1999 Jeep Cherokee sport/air vents do not blow out cold or hot while it is on


this sounds like the recirculation door in the heater box is broken and this is a difficult and can be an expensive repair as the dash has to be removed for access. a quick check for this is if you release the glove box and let it hang you will see the heater box if you reach up to the left top you will feel a grid and the recirc flap is housed there you can operate the blower and hot and cold and see if flap moves

Jun 02, 2009 | 1999 Jeep Grand Cherokee

2 Answers

PREVIA 1992 NO HEAT


If you have 150k on it, you may need all three. Run the engine, turn on heater, and get out and slam the hood a couple of times. In extreme cold or hot weather, this may get you by for a few days. I went 3 or 4 months with a bad blower by doing this, when the brushes inside the motor went bad. If it does not work, your blower is probably bad. The switch can have bad contacts, and you may try moving or holding it vertically to see if you can get any activity out of it. Put a resistor in too, if you have to replace the blower motor.

Mar 28, 2009 | 1991 Toyota Previa

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