Mercedes says not to adjust them, but. Replace the water valve if it doesn't open or shut properly. Part 3 of 3: Testing the repair Step 1: Test start vehicle. If it is determined that the evaporator temperature switch or sensor is not working as it should, it will need to be replaced by one of our expert mechanics. Usually, you can get access to it by simply looking under the dash.
I run a parallel flow condensor, aux. This is to help prevent condensate water from freezing which can hamper the air flow in your air conditioning system. Once the tab has been depressed, you can easily remove the electrical harness. Step 13: Remove the instrument panel by unbolting the three instrument panel side bolts. The sensor is mounted to the evaporator itself, if not very near it.
Use a new one during installation and tauten it to 25 Nm. Note: never use recirc in winter because you will fog up the windows. Also, make sure you keep an eye for any signs of overheating or corrosion from the sensor itself. The purpose of which is to remove the heat from the air inside the cabin and reduce the temperature inside the vehicle. It should be at a reasonable level before working.
You will hear the blower running, but no air coming out. Remove side dash panel, the door spill plates, and weather stripping, as well as the steering wheel from the center steering shaft. Great, I can dial this sucker right in! Clear error codes with scanner. This service will be performed for you at no charge until April 30, 2016. If this is the case, simply press the clip onto the back of the sensor. Finally, remove the instrument cluster and any electrical cluster harnesses. Now seems like an good time to replace a faulty one :- This is the thing Im talking about btw: Is it a resistance between the two pins that varies with temp? Step 11: Remove the upper steering column shaft, the instrument cluster finish panel, and the instrument cluster.
If you don't feel comfortable with this, do not attempt to complete this job. Use commonsense in doing this. These bolts should be tightened to 18 Nm during installation. On many of today's cars, the driver has the luxury of setting a desired temperature inside the vehicle through the control panel. Many times, these are resistor type sensor, which means the resistance within the sensor changes in direct relation to the temperature.
. Quick cool down after parked in the sun is my big deal with airco and it's difficult in our old cars. Step 3 Check the wiring and located the evaporator temperature sensor. Use a multimeter to record the resistance within the sensor, and compare it to the desired values set by the manufacturer. The most popular engine was the 2.
This repair guide shows you how. Step 2 Test the temperature sensor. The sensor is usually on the evaporator inside the plenum case under the dash. The is typically located behind the firewall of the engine compartment, tucked in tightly behind the dashboard as well. Do I have to discharge the system to replace those? It's a cheap sensor, so I figured I'd just replace it and see it that fixes it. One screw adjusts the set point works the large spring and one adjusts the range by tensioning the points that act as the switch contacts. I don't know what else to try to get it to work.
The following are general steps that typically need to be completed, but you should follow the steps outlined in your service manual. Put the thermometer into the liquid coolant , if temp is 180 F +- 20 , the problem is electrical. Keep in mind: Air conditioning systems are filled with refrigerants that require professional recovery and disposal. I had read if it was white in color it was likely trouble, and it was, so I was excited that maybe this would fix the issue. If this occurs, you'll have to replace the sensor. I just need a couple of pointers and I'll be on my way.
Offer valid for online purchases only. This is often mis-diagnosed as a bad sensor, so initially be sure that the system is free of any air and is completely filled with coolant. Step 3: Turn on the ignition and for no less than 30 seconds, observe the air bag warning indicator. If you do find that this does not solve the problem, and you determine that a sensor replacement is called for, it is always helpful to provide the engine size. Cannot be applied to previous purchases and cannot be redeemed for cash.