Ac anläggning bmw rest
Common Mistakes To Avoid During The Reset Process; 5 Frequently Asked Questions For How To Reset A Blend Door Actuator. How Do I Know If My Blend Door Actuator Needs To Be Reset? What Is A Blend Door Actuator? How Can I Reset A Blend Door Actuator? Can I Reset A Blend Door Actuator Without Disconnecting The Battery?. This is a minor item to facelift, but it was included in the E39 model year refresh nonetheless.
But fear not, REST functionality is not lost! This article details how to properly retrofit the new HVAC panel and associated solar sensor. In fact, it took me several years of owning an E39 to definitively determine what it is for. REST in fact stands for residual heat. This is useful under the right circumstances, say while pumping gas and leaving passengers in the car, or during a 5 minute trip into the store with passengers in the car during cold weather.
In ignition key position 1, you can alter the settings of the automatic climate control. With the ignition key in position 0, the system automatically directs heated air to the windshield, side windows, and foot wells. This function may be activated when the outside temperature is below approx. When the ambient temperature is above approximately 59F 15C and this button is pressed, it automatically lowers both temperature zones to This is a very useful feature when returning to the car on a hot summers day.
No more do you need to make 57 button presses to adjust the AC system to maximum. Once the cabin has cooled down, you can press the MAX AC button again to restore the previous settings, or manually adjust it as you see fit. The best of both worlds. Secondly, and to avoid stored codes in the AC module, we must retrofit the solar sensor. The solar sensor is that little bump up in the windshield air vent on the dashboard.
It is pinned directly to one of the HVAC plugs. The wires run underneath the dashboard. Apparently, the singular solar sensor has two smaller sensors in it. We need to remove the existing HVAC panel.
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You can do this very carefully with plastic non-marring pry tools. Gently prying it outwards will pop it out. Try to remove it evenly, so it will not bind. Alternatively, you can push it out from the rear.
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The choice is yours. Unplug the various connectors that are seated into the HVAC panel. The smallest black plug just pulls straight out. These are very typical connections, and are found in many places throughout various BMW models. We can now wire in the solar sensor extension cable. The part numbers for these electrical pins are no longer listed on RealOEM. I would recommend sourcing the entire extension cable from a parts car.
Feel free to contact me here with an inquiry for this part. The extension cable connects the solar sensor to the back of the HVAC panel. This will be a 4-pin cable. It plugs in directly to the solar sensor. At the HVAC panel, we will be pinning these wires into the largest, most-populated connector. It plugs into the white connector solar sensor extension cable that then pins into the rear of the HVAC panel.
To properly install the solar sensor, the upper dashboard must be removed. To do that, please refer to this video also embedded below. The proper location for the solar sensor is in the windshield air vent on the dashboard. There are two slots to this vent. There will be plastic that must be cut out of this vent to make room for the solar sensor. The solar sensor has spring metal tabs on each side that will snap it into the opening.