# Weak ventilation output

**URL:** <https://community.cartalk.com/t/weak-ventilation-output/11823>\
**Category:** Maintenance/Repairs\
**Created:** [March 15, 2008, 2:06am UTC](https://community.cartalk.com/t/weak-ventilation-output/11823 "2008-03-15T02:06:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RandomTroll](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/randomtroll/32/12184_2.png) [@RandomTroll](https://community.cartalk.com/u/RandomTroll)\
**Post date:** [March 15, 2008, 2:06am UTC](https://community.cartalk.com/t/weak-ventilation-output/11823/1 "2008-03-15T02:06:42Z")

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My '87 Toyota Pickup’s ventilation system blows very  
  
 weakly. I have taken it apart and cleaned out the crud.  
  
 The blower’s blades are still whole and the motor sounds  
  
 good. It doesn’t matter whether it takes air from inside  
  
 the cab or outside (I cleaned the outside intake vents  
  
 after a bear bent up the vent cowl louver anyway.) I  
  
 care most about defrosting the inside of the windshield  
  
 in very cold weather, when my breath freezes on the  
  
 inside of the windshield.  
  
  
  
 Could it be the filter on the door that controls the  
  
 inside/outside mix? What would I replace that with?  
  
  
  
 Any other ideas?

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**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\
**Post date:** [March 15, 2008, 2:42am UTC](https://community.cartalk.com/t/weak-ventilation-output/11823/2 "2008-03-15T02:42:26Z")

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If you have a big bug deflector, it could spoil the intake pressure while you are moving. I had one on a 87 Mazda pickup and it practically stopped the air. Check the door frames for exhaust ducts and be sure they are clear. I don’t remember filters on that year pickup.

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**Author:** ![meaneyedcatz](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/meaneyedcatz/32/692_2.png) [@meaneyedcatz](https://community.cartalk.com/u/meaneyedcatz)\
**Post date:** [March 15, 2008, 4:48am UTC](https://community.cartalk.com/t/weak-ventilation-output/11823/3 "2008-03-15T04:48:19Z")

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When you say weakly do you mean w/out much force? If so change the blower motor…easy fix. Just because the blower motor works does not mean it does not need replacing.