Date: Tue, 19 Feb 2002 15:22:58 -0500 From: "EricL" <elaw-NO-SPAM-nopsamsinc.com> Subject: Re: Aircon woes - '98 9000 (UK)
Another possiblity is the "evaporator anti-freeze thermostat". The evaporator is the "cooling coil" in the A/C system, which cools the air and removes moisture from it. The thermostat is there to prevent the evaporator from going below the freezing point and becoming a huge ice cube. It's supposed to cut-off the A/C if it drops to about 34 degrees F and turn it back on at about 38-40. If the thermostat gets flaky, it can allow the evaporator to warm to the point where it starts sending moisture back into the car, fogging the windows (and making the occupants *really* uncomfortable in the summer). It's not a hard problem to diagnose - put a thermometer in one of the vents, set temp to "lo" and the fan on a medium speed. If it's working right, the thermometer will show a steady temperature of 35-45 degrees F, depending on the weather. If it's not you'll see the temperature vary, often erratically. Good news is the 'stat is easy to replace and fairly cheap (US$20.00 aftermarket). Eric Law "Pidgeonpost" <pidgeonpostnopsamail.com> wrote in message news:a4u6n9$p9h$1nopsam8.svr.pol.co.uk... > Julian...there are a number of fairly well documented possible causes for > this problem. Have a good look on this and other NGs for details, but > possible causes include:- > > 1. Having the 'recirculation' button pressed on the ACC control panel. This > is cheap to fix - any easy diy job. > 2. Leaky heater matrix - not always as obvious as it sounds as the leak only > needs to be minor. > 3. External water leaks into the car, raising the overall humidity - ACC > then fails to cope. > 4. Dead or malfunctioning recirculation motor, which opens/closes a flap > within the system. Listen carefully when you turn the ignition on (without > starting the engine), and you may hear the faint whine as it does its job. > 5. Blocked drain in the bulkhead - need to remove the plastic cover and > check drain is not full of dead things. Pour some water into the area and > check it runs out. > > This is a real pain - I had same prob for over a year. Problem turned out to > be (4). > > Best of luck.... > > > > "Julian" <julianDOTmaySPAMnopsamMOVEinternet.com> wrote in message > news:a4tf3i$bb3$1nopsam-ma.sol.co.uk... > > Hi Folks > > > > The aircon on my 9000 anniversary is playing up, and the dealer can't > > resolve it. > > > > When the outside temp drops below about 4 degrees, the car mists up > heavily > > for 10 mins, then slowly clears, before misting again. The controls are > not > > on re-circ, and if I put the demist on full, the situation gets worse. > > > > Any clues, anyone? > > -- > > > > Cheers > > Julian > > > > > >
 |
 |
 |
 |
 |
