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Posted on Mar 23, 2014
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Replace heater blower motor

Repair/replace heater blower motor

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Anonymous

  • 84 Answers
  • Posted on Feb 06, 2009

SOURCE: How do I replace the heater blower motor on a 1989 190e

Hello, The blower motor is located below the windshield wiper assembly. You have to remove the plastic cover that below the windshield then remove the wiper assembly, then you will see the blower housing. Remove the screws from the housing then remove housing cover. Look close because some of the screws are hard to see. Once you get the cover off, you will see the motor and there is a metal strap that holds it down. Take a punch or whatever and stick it in hole in the strap and push down. Then the motor will come out.
I hope this helps.
CYA, Gator241

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Anonymous

  • 3 Answers
  • Posted on Feb 21, 2010

SOURCE: how to replace ac heater blower motor

i need to know how to replace the blower motor on 300e mercedes ,please call me 718 835 2596 il greatly appreciate it

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Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
  1. Start the engine.
  2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
  3. Set the mode selector to FLOOR mode.
  4. Set the heater control selector to the warmest temperature setting.
  5. Set the blower speed the lowest setting.
  6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
  7. Set the mode selector to PANEL mode.
  8. Select the maximum blower speed.
  9. Select the warmest temperature setting.
  10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
  11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
  12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
  13. Inspect the temperature door operation. Repair any problems found, go to step 17.
  14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
  15. Replace the heater core. When the repair is completed, go to step 17.
  16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
  17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.
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Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
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  2. Measure the engine operating temperature. Does the engine reach normal operating temperature (approx. 200° F)? If yes, go to the next step. If the engine does not reach normal operating temperature, go to step 7.
  3. Select the minimum blower speed. Select the warmest temperature setting. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 10. If the hose temperature feels approx. the same, go to the next step.
  4. Test the operation of the A/C compressor clutch. Does the A/C compressor clutch engage? If yes, go to step 6. If the compressor clutch does not engage, go to step 5.
  5. Inspect A/C compressor clutch and controls. Repair or replace as needed, go to step 13.
  6. Determine if the A/C system is operating within specifications. If yes, go to step 8. If no, go to step 11.
  7. Check the low engine temperature problem. Repair any problems found, go to step 13.
  8. Inspect for correct operation of the recirculation door. If the door is operating correctly, go to step 13. If the door is not operating properly, go to step 12.
  9. Check air delivery system. Repair any problems found, go to step 13.
  10. Check the heater core for blockage. Repair or replace as needed, go to step 13.
  11. Check A/C performance. Repair or replace as needed, go to step 13.
  12. Repair the recirculation door concern. When the repair is complete, go to step 13.
  13. Operate the system in order to verify the repair. If the system is operating properly, the procedure is complete. If the system is still not providing proper defrosting, repeat the entire test.
Noise from Blower Motor
  1. Inspect the air inlet grille for debris. If the grille has debris, go to step 7. If the grille is clear, go to the next step.
  2. From inside the vehicle, close all vehicle doors and windows, turn ON the ignition, with the engine OFF, and cycle the blower motor through all speeds in order to determine where and when the noise occurs. If noise is heard during the blower operation, go to step 3. If there is no noise, go to step 10.
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  4. Listen to the blower motor at each blower speed. Is the blower motor making a squeaking or chirping noise? If yes, go to step 8. If no noise exists, go to step 10.
  5. Remove the blower motor, and inspect the blower motor and impeller for deposits of foreign material. If there is debris, go to step 7. If there is no debris, go to the next step.
  6. Inspect the blower motor impeller for cracked blades, loose impeller retainer, or improper impeller alignment. If any of these conditions exist, go to step 8. If none of these exist, go to step 9.
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Everytime i turn my heater on heater on works and blows fuse?
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