Question about 1999 Chevrolet Malibu

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Blow motor working only on high speed - 1999 Chevrolet Malibu

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Go to a Junk yard and find a replacement switch(all three Switches).. The new ones will run you about $ 125.00

Posted on Jun 25, 2009

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Blowing 50 amp high blower fuse instantly in 1997 3500HD sierra GMC.. all other speeds work except for High speed..


I would suspect a short in the blower motor. Lower speeds are through resistors, high speed is direct to the motor. Unplug the motor and try going through the speeds.

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My audi a4 only blow heat on when it is running on high speed


You have a defective HVAC blower motor speed control resistor, replace it. When they go bad they only allow the blower to work on high speed. The resistor is located near the blower motor.

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2006. I switched the vents from front to feet and defrost and turned it up all the way and it stopped blowing. Why?


That is the blower motor relay, probably . You have all speeds but high ? High speed has a direct path to the blower motor through a high blow relay . All other speeds go through the blower motor resistor assembly . This relay is part of the blower motor resistor assembly > That is if you have manual HVAC system .
Blower Motor Resistor Assembly (CJ3)
Under the right side of the I/P mounted to the HVAC box next to the blower motor.

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Why is my air condition only blowing on the high setting?


you need a blower motor resistor to get all the speeds again.

Jul 03, 2014 | 1999 Plymouth Grand Voyager

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A/c will not blow on high


Could be the high speed blower relay. On most models the lower speeds are controlled by the resistor and high is powered by a relay.

Jul 24, 2013 | 1998 Oldsmobile Intrigue

1 Answer

A/c is cold but the fan is not working to blow it into the car stopped working on high first now will not blow at all


Check your blower motor resistor. It is commonly the part that the blower motor power connector plugs into. It sounds like the high speed element went first and you lost the high fan speed. If the remaining resistor element is broken, the fan will stop working. The resistor only have 2 elements; if they're both broken, it creates an open circuit to the blower.

Jun 24, 2011 | 1996 Mercury Mystique

1 Answer

Heater only blow on number 4 and heat coming out


You don't list the vehicle your asking about but in general when the blower motor only works on the high speed the blower resistors have blown. The resistors are what control the fan speed, when they go bad only high will work. The resistors blowing is usually a side effect of a blower motor going bad, pulling too much current. When replacing the resistors it's advisable to replace the blower motor as well so as not to have a repeat problem.

Aug 19, 2010 | Ford Festiva Cars & Trucks

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Heat/ac fan only blows on high


Check the heater control switch,,,,,and the number of wires at the heater motor....Some motors have more than one winding...in which case there will be three or more wires going into motor..there can be burnout in those windings and will require a new motor....check the plug which attaches to the motor....can be bad connection...or at the switch.....but if there is only two wires....then the heater switch uses resistors to slow down the different speeds...and direct connection for high speed....and the problem is definitely the switch...

Apr 27, 2010 | 1996 Lincoln Town Car

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • 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 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 high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

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