Question about Lexus LS 400

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When A/C is turned on blower is noisy-blade is apparently striking an object

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  • kerrplunk1 Oct 01, 2009

    All you did was tell me I have the problem I told you about. Tell me how to get at the blower to remove it.

  • kerrplunk1 Oct 02, 2009

    I have a 1993 Lexus LS400. When the blower is turned on it is noisy. The noise increases with an increase in blower speed. The blower blades are apparently striking something.
    I have removed the "instrument panel No.2" which is the lower part of the instrument panel.This gave me access to the filters which I found to be filled with dog food (I store dog food in my garage) . Evidently a rodent in my garage has climbed into the AC blower area. Can you provide me specific instructions as to how to access the blower and remove for inspection and cleaning.

  • kerrplunk1 Oct 02, 2009

    Also when the heat is on.

  • kerrplunk1 Oct 02, 2009

    Regardless of the fan switch position I get the noise of the fan stricking something whenever the fan is turned on

    Do you have access to instructions for removing the fan and/or can you tell me how I can get such?.

  • kerrplunk1 Oct 03, 2009

    Thanks forthe blower drawing, but I ask you a question-where is the blower located?

    Is it on the passenger side of the firewall or the engine side?

    I have removed the instrument panel undercover and pulled out the filters. Is the blower near this? There are two pieces of equipment and a lot of wired connections.

    How can I get instuctions to follow for blower removal?

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5 Answers

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  • Master
  • 1,734 Answers

You need to check or maybe replace the blower unit casing. You may have to remove the dash to get to it. I would look under there first to make sure, though.
This is a picture of it:

Posted on Oct 03, 2009

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  • Master
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Hi buddy the bearings on the motor have gone / callapsed which then cause the blade to drop on the shaft which then hits against the casing you need to access the motor and strip it down and take the bearings out once you have done this get back to me and i can get a set ordered up for you

Posted on Oct 02, 2009

  • ollie reece-jones
    ollie reece-jones Oct 02, 2009

    here a diagram off the blower

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  • Master
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The A/c blower requires a 2 fans to circulate the ai. One is for sucking in the air from the interior of the cabin and another one for distributing it. Try to put/switch on justthe bower to supply fresh air with the A/c turned off. In this fashion you will come to know which fan is making the noise and if possible check that fan yourself for locating which object is in the way. Simple things like the circular air seal might have snapped and is striking the fan. The covering(now-a-days made of plastic may have cracked and is brushing the fan.........................sodeep

Posted on Oct 02, 2009

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  • Master
  • 426 Answers

Is this only when you put on the a/c or when you put on the heat also.

Posted on Oct 02, 2009

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  • Lexus Master
  • 76,630 Answers

This problem is caused by worn out blower motor bearings, this allows the squirrel cage air blower to hit the casing it rides in, replace the blower motor, it is on the passenger side under the dash, u will need to pull the under dash panel off and the poss the glove box out to access it.

Posted on Oct 01, 2009

  • yadayada
    yadayada Oct 01, 2009

    what is the year of the car? most LS 400 blower motors are located under the passenger side of the dash, to access it remove the cover panel under the dash, remove the glove box door and liner/compartment, the blower will be held in by 4 or 5 8mm head machine screws, disconnect the electrical connector to the blower motor, then remove the screws and pull the blower out and down out of the housing it sits in.

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