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A/C

Discussion in '4th Gen 4Runners (2003-2009)' started by Deckthebolls2, Jul 3, 2024.

  1. Jul 3, 2024 at 7:32 PM
    #1
    Deckthebolls2

    Deckthebolls2 [OP] New Member

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    Anyone else noticed that the passenger a/c air randomly just became significantly colder and the drivers a/c was cool but not near as cold as the passengers side? lol. Then it like gets colder then warmer the whole time until I shut off my car.
     
  2. Jul 3, 2024 at 8:20 PM
    #2
    gkomo

    gkomo New Member

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    Sounds like one of your actuators is going bad
     
    icebear and Deckthebolls2[OP] like this.
  3. Jul 3, 2024 at 11:25 PM
    #3
    Deckthebolls2

    Deckthebolls2 [OP] New Member

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    Not everytime, but on high you can hear the blower motor. could that cause the different temps? Sorry if these are dumb questions
     
  4. Jul 4, 2024 at 3:51 AM
    #4
    JChiz

    JChiz Old Member

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    I was having a loud noise only when the fan was on high. I removed the fan (simple process) and found debris in there, cleaned it out and reinstalled the fan. No nore noise and it only took about 15 minutes.
     
    Deckthebolls2[OP] likes this.
  5. Jul 4, 2024 at 5:33 AM
    #5
    Strongarm

    Strongarm New Member

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    It’s possible that you are low on refrigerant. Simple visual leak checks on A/C components can confirm a large leak, or you may need someone to perform an evacuation and recharge with dye. Then a black light is used over A/C fittings to look for a leak.
     
    Deckthebolls2[OP] likes this.
  6. Jul 20, 2024 at 3:54 PM
    #6
    Iamsam

    Iamsam New Member

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    I'm having a similar issue. First, I notices the blower out through the vents seemed weak, so I changed the cabin air filter. I should have done that a while ago. it looked like it had spent a year in the bottom of a hamster cage. I tend to drive with windows down if it's below 85 or so, so I was slow to notice these issues. Then I discovered what you posted. A/C wasn't as cold as should be on either side, but there was some cold through passenger vents, driver's side was pretty much ambient temperature. I thought maybe some stuff had gotten past the CAF, but the air volume seems the same on both sides. I was planning to get the system recharged next. It definitely needs it, never been done since the car was new in 2007. But another commenter mentioned "actuator", I think I'll find out what that is about first.
     
  7. Jul 20, 2024 at 3:55 PM
    #7
    Iamsam

    Iamsam New Member

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    I'm having a similar issue to the OP. Can you please explain the role of these "actuators"? Thanks.
     
  8. Jul 20, 2024 at 4:09 PM
    #8
    AuSeeker

    AuSeeker Old As Dirt

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    The issue you're having has nothing to do with any of the actuators, the most common cause of this symptom is low refrigerant, it's very common in 4th Gens T4Rs, have the system serviced and it should be good.

    The only way an actuator could cause something similar would only be on a Limited model that has the "Dual" zone HVAC system, the SR5 only has a single zone and as such only has one actuator to control the air temperature, so that can't be your issue unless it affecting both sides the same and the system is fully charged.
     
    Last edited: Jul 20, 2024 at 4:17 PM
  9. Jul 20, 2024 at 7:28 PM
    #9
    gkomo

    gkomo New Member

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    I do have dual climate zone on my limited. My symptoms were, driving home one night with the heater on, my air suddenly became cold, but my wife’s stayed hot. I knew it was my drivers side actuator as that controls the dual climate zone functionality. There are two actuators on the passenger side, maybe do a recharge first as that’s fairly cheap and if that doesn’t fix your issue you can research the actuators you do have.

    @AuSeeker dont all 4Runners have two on the passenger side? I thought the dual zone is an additional one on the drivers side, which was the one I replaced.
     
  10. Jul 21, 2024 at 3:52 AM
    #10
    AuSeeker

    AuSeeker Old As Dirt

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    All 4Runners have 3 on the passenger's side, 1 for mode/vent, 1 for air mix/temp and one for recirculation, the Limited has another on the driver's side for air mix/temp.
     
  11. Jul 21, 2024 at 6:38 AM
    #11
    Iamsam

    Iamsam New Member

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    Got it. Thanks!
     

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