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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Blower motor RPM adjustment knob?

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Old Jun 2, 2018 | 02:08 AM
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Paul22RE's Avatar
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From: NNJ
Blower motor RPM adjustment knob?

92 Pickup 4x4 22RE: Behind the glove box, I noticed an adjustment knob that says RPM, so I assumed it would adjust the blower motor fan speed but seems to do nothing. What is this knob for? Thanks.
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Old Jun 2, 2018 | 05:29 AM
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I seem to remember this as an adjustment for engine RPM (idle) when the A/C compressor kicks on.
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Old Jun 2, 2018 | 07:57 AM
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From: NNJ
Ahh, that makes sense. It is attached above the evaporator box. Now I have to set it back to where it supposed to be, thanks! Anyone know the proper idle RPM when A/C is on?

Last edited by Paul22RE; Jun 2, 2018 at 07:59 AM.
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