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99 chevrolet suburban water leaking into heater blower motor

Turned heater on, smoke came out from under dash and also out the vented area in front of windshield. removed heater blower motor, it had a large chunk of ice in it. Where would this have came from, what needs to be done to fix so won't happen again

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  • MadThylacine Jan 19, 2013

    I have the same problem. Water is leaking in to the HVAC system from out side and in to the blower housing. When it froze it locked the blower fan so it could not move and over heated the blower motor. Blew the fuse under the hood 50 amp big red one. I've read a few answers on other sites but have not taken apart the HVAC system behind the dash yet. Some how water is leaking in from the cowl where the wiper blades are. There is a drain tube on the fire wall below the coolant resevoir. Some how it is getting from that drain pan in to the HVAC and down to the blower motor. I have read about a deflector door for outside air, but I have not gotten that far yet.

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SOURCE: 99 cavalier Smoke coming out from under dashboard!

now this may be a long shot... but i had a similar problem on my cutlass. but it wasnt wiring...... it was from the tube running from the head of my engine...... the smell and smoke were coming from hot oil coming out of the crank case vent tube and then being sucked into the air inlet for the heater/ ac.

since a electrical wire's protective cover is petroleum based as is oil.... they smell very similar

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SOURCE: 1983 Chevrolet Suburban Heater fan not working

check relay and blower resistor...likely the relay is bad.

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Posted on Dec 03, 2009

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SOURCE: 1997 Checy Suburban k1500....front heater blower

This is what I have been able to find about how to remove your blower.

please let me know if you need further assistance.

With Air Conditioning

  1. Disconnect the negative battery cable.
  2. Remove the instrument panel compartment.
  3. Unfasten the forward-most screw in the right side door sill plate. Remove the trim panel from the right hinge pillar.
  4. If necessary for access, unplug the ECM wiring and remove the ECM.
  5. Unplug the electrical lead at the blower motor and if equipped, remove the underdash courtesy lamp.
  6. Remove the bolt from the right side lower instrument panel support. Remove the blower cover and the cooling tube.
  7. Unfasten the flange screws and pull out the blower motor. You may have to pry back the right side of the instrument panel slightly. Be careful!
To install:
  1. Position the blower motor and install the mounting screws. Be careful not to catch the blower on anything when sliding it in.
  2. Install the cooling tube and the blower shield.
  3. Install the bolt into the instrument panel support.
  4. Attach the courtesy lamp and the blower electrical lead.
  5. If removed, install the ECM. Attach the wiring harness.
  6. Install the trim panel on the pillar. Don't forget the screw in the sill plate!
  7. Install the instrument panel compartment and connect the battery cable.


Please do not forget to rate and comment about your experience today with Fixya.

Posted on Dec 28, 2009

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SOURCE: I need to replace the heater core & blower

i could send you directions with images to replace heater core need email address and 8th digit of vin, W or X

Posted on Feb 07, 2010

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