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  • Aircon problem due to mud

    I had some aircon problem recently with a/c not working/light blinking. I paid a brief visit to Toyota service to be told that the problem is due to mud buildup on the radiator and aircon compressor, which is blocking the a/c air intake. They also said they could fix it and clean both radiator and compressor for a fee but I thought I could do it myself...

    Anyway, after cleaning the mud off the radiator the a/c was back on in full power. I was quite happy until the problem came back again....this time the a\c is switching on and off randomly....also, I think I can smell that mud somehow with the air coming out of the vents.

    I was wondering what else should I clean? I just steamed the front radiator but there could be some more mud blocking the air intake, perhaps on the compressor...??? The problem is that I just don't even know where and what to look for in the engine bay... ops: ...can you offer any ideas?

    Did you have any similar a/c problem due to mud?
    2003 LC4 D-4D AUT

  • #2
    Re: Aircon problem due to mud

    this time the a\c is switching on and off randomly....also, I think I can smell that mud somehow with the air coming out of the vents.
    Have you checked the cabin filter and heater box? (Behind the glove box)

    Mick
    [CENTER][B][I][SIZE=1][COLOR=blue]1KZ-TE Turbo Diesel, 5 speed manual, 3.5 inch lift, 265/70/17 Mickey Thompson MTZ, D-Tronic chip, Boost controller, mandrel exhaust, dump pipe, modified intake, ARB steel bar, Magnum winch, Safari snorkel, rear drawers, half cargo barrier, dual batteries, Uniden UHF, Sat Nav, reverse camera, Magellan XL , Tjm bash plates, ARB alloy roof rack, rear telescopic work light and numerous other modifications!!!
    Now with 3BAR MAP sensor & 18PSI Boost![/COLOR][/SIZE][/I][/B][/CENTER]

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    • #3
      Re: Aircon problem due to mud

      I changed that filter a while ago. I will check it again but I don't think this filter would cause a\c to stop working....
      2003 LC4 D-4D AUT

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      • #4
        Re: Aircon problem due to mud

        Check the system presure switch which is in the AC line infront of the radiator, maybe it's damaged or there is mud/water in its connector.

        Mick
        [CENTER][B][I][SIZE=1][COLOR=blue]1KZ-TE Turbo Diesel, 5 speed manual, 3.5 inch lift, 265/70/17 Mickey Thompson MTZ, D-Tronic chip, Boost controller, mandrel exhaust, dump pipe, modified intake, ARB steel bar, Magnum winch, Safari snorkel, rear drawers, half cargo barrier, dual batteries, Uniden UHF, Sat Nav, reverse camera, Magellan XL , Tjm bash plates, ARB alloy roof rack, rear telescopic work light and numerous other modifications!!!
        Now with 3BAR MAP sensor & 18PSI Boost![/COLOR][/SIZE][/I][/B][/CENTER]

        Comment


        • #5
          Re: Aircon problem due to mud

          It's all good fun to go playing in the mud until something stops working properly.

          I took a crew out on a 4WD training course out of Esperance and they wanted to visit their local mud pit. Well, that horrible stinking grey gunk got into everywhere. Most of it was able to be washed out.

          Not so for the Rodeo that needed a new alternator because the mud got into it and ruined it.

          The Tojos scrubbed up ok though.
          Dave
          Views expressed are mine alone and are not intended to compromise the integrity of my employer nor offend those who may read such views.
          Bugger Bali, get out and see Australia before we sell it all to China.

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          • #6
            Re: Aircon problem due to mud

            Firstly: there is no air intake on the compressor, it is totally sealed and compresses refrig gas and turns it back into liquid to re feed the evaporator, so nothing to clean apart from rubbish around the clutch area.
            If the A/C/ condenser (the bit like a radiator) is partly blocked it will cause a high gas discharge pressure from compressor and the H/P safety will
            dis-engage clutch until pressure reduces, then re engage clutch, causing short cycling.

            Secondly: Short cycling can be caused by a partially blocked filter/ air flow across evap coil (in dash-board area) as it slows air flow across the coil to the point that the air OFF coil gets colder more quickly, thus the thermostat turns the compressor off and on more frequently.

            Thirdly: If there is a loss of refrigerant, the L/P (low pressure switch) will shut the compressor off also until the suction side returns to normal.
            The L/P switch can also be operated by a blocked coil/air filter, as this causes a low pressure in the system.
            John

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