The Thermo control AMP (part number 27675-9Z000) is a thermister that controls the compressor clutch. Cost around $44.00 at Nissan dealership, the salesman told me that they keep those and high pressure hose in stock regularly.
The device is set to come on at 39-41 F and go off at 37-38 F.
**The TCA(Thermal Control Amplifier) which essentially is a clip on one end connected to two wires and a RED square thermostat looking clip on the other.
The part is around $44 but make sure you get the right part, on a 2000 has a Three prong clip, depends on the year of the vehicle.
Removal procedure:
Remove the Glove compartment entirely (four black screws on paremeter)(2 black screws that lock glove compartment)
ONce removed you will see a BLACK BOX - This is where you will need to reach to exchange the wire(TCA)
First, remove 3 silver screws facing down that hold BLACK BOX tightly together.
Second. Try to remove as many GOLD larger screws as possible, You will find some facing the passenger seat easily but others are hidden behind the wiring and tucked away, look really hard especially on the left hand side of the box because this is the area your hand will need to enter.
ONce you've taken those screws out, you will be able to pry open the black box, reach in, you will see the RED square CLIP tucked into the RIBS of the Radiator coolant. just pull it out, it's a plastic clip and won't break, pull to your left.
Detach the white clip from the Box.(the white clip slides into the box, push it down to get it off)replace with the new one, place the RED TCA in the same area as before.Re-install all screws. Let the car run for a while,that's it problem solved.
Note:Nissan has also had these a/c problems for a long time. The hoses that constantly need to be replaced are very cheaply made,part of the problem also may be vibration related and the bends where the rubber and metal (aluminum) are crimped have to much pressure at those points and leak after a while.
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