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Location of Thermo Control unit?


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2 replies to this topic

#1 mattski

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Posted 18 August 2003 - 12:35 PM

My 93 Legacy AWD 5spd Wagon is having issues with the compressor cycling on and off rapidly. I was advised by a couple of members that it is mostl likely a bad Thermo Control located "behind the glove box". However, I removed the glove box, but cannot find the old unit.

Does anyone either remember the exact location or have a shop manual which would show it?

Thanks in advance.

Matt

#2 theotherskip

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Posted 18 August 2003 - 02:00 PM

you should be able to find the thermostat located on the evaporator unit, which is located in the ductwork under the dash. it is generally located behind the glove box. You will need to remove the glove box, blower, then open the ductwork to get to it (not a fun job overall). when you get to it, be sure to note exactly where it is placed on the evaporator, as its placement is important - the temperature varies as you move across the evaporator.

but you should first check that you are not low on refridgerant. often the compressor cycling more frequently is a sign that the refridgerant is low. i'm not sure when the refridgerant was changed from r-12 to r134a, but if yours is r-12, there should be a sight glass on top of the reciever/drier. look through the sight glass, and if you see lots of bubbles, the system is low. if the system is at normal charge, it will have just a few bubbles. if it is 134a you will need to have it checked with a pressure gauge...

#3 mattski

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Posted 18 August 2003 - 08:36 PM

Thanks very much. I was not aware that it might be in the duct work. I thought that it was somewhere on top of the box, but not inside it. I will have to dig deeper into the system.

Thanks again,

Matt




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