2003 Lexus ES 300 A/C blower only runs at slow speeds

2003 LEXUS ES 300
122,000 MILES • 6 CYL • FWD • AUTOMATIC
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ROGERLARIAT
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The A/C blower only blows at low speeds. The speed control display shows that the fan works at all speed levels, however there is minimal air flow.
Aug 25, 2008 at 11:03 AM
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RASMATAZ
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Sounds like the problem lies on the AC Amplifier-what it does is send signals to the blower motor to control its speed by changes in duty ratio, To include trouble in the blower motor wiring circuit.


https://images.2carpros.com/forum/automotive_pictures/12900_blower_9.jpg

Sep 4, 2008 at 9:24 PM
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ROGERLARIAT
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Where is the A/C amplifier located?
Sep 5, 2008 at 9:32 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Where is the A/C amplifier located?

Its on the heater control housing sub-assy
Sep 5, 2008 at 2:30 PM
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