Milan_OH Posted August 16, 2019 Share Posted August 16, 2019 I've had this issue for a couple years now, and lived with it. A/C is ice cold while moving at any speed, as soon as I come to a complete stop, after a couple seconds, I can watch the ACC gauge drop from the mid-point to nearly the bottom of the display in conjunction with the warmer air progressively blowing from vents. I'm presuming the compressor is disengaging. It doesn't matter if in EV mode or the ICE is running. I can force ICE mode by pushing on the gas pedal and brake simultaneously, but doesn't matter. After I start moving, and, after ~7s, the ACC usage meter increases and cold air returns. I'm ready to let "the man" take a look, but thought I'd try the forum for any suggestions. I was hoping the symptom was related to the "restoring EV mode" issue.....a FOMC programmed "feature" to preserve the HVB, however, I've implemented the EV restore successfully and no change. Thanks, Jack in Ohio 0 Quote Link to comment Share on other sites More sharing options...
VonoreTn Posted August 16, 2019 Share Posted August 16, 2019 Hi Jack, I used to drag race at the Milan dragstrip, going back to 1968. Mine works fine at idle at 135K miles. It might be that your electric condenser/radiator fan isn't working, so vehicle speed generated wind is needed to keep the condenser head pressure down. Open the hood at idle on a hot day and see if the condenser electric fan is running. 1 Quote Link to comment Share on other sites More sharing options...
Milan_OH Posted August 19, 2019 Author Share Posted August 19, 2019 Vonore - You nailed it! Radiator fan not running, so between your suggestion, pulling a p0480 code (fan 1 control circuit), and one YouTube video later, I diagnosed the problem. Per the YouTube video the fan control module has 3 wires, 2 large for power and ground, and the smaller one for the pulse width modulated signal to tell the fan how fast to run. Upon visual inspection, the control signal wire insulation looked slightly corroded, and sure enough it was open an inch from the connector. Fortunately, there was enough wire on the connector side to strip and tin, and I soldered them together, heat shrank them, and great joy was had. A/C compressor now runs at idle, and I believe the fan runs anytime the A/C is on since I tested after sitting overnight. A little disappointing the wire didn't hold-up to heat and time, but it could have gotten nicked over the last 10 years and corrosion set-in. I've never been to Milan, MI other than passing thru on US 23 on the way to the UP to play in the snow. Many Thanks! Jack in Ohio 0 Quote Link to comment Share on other sites More sharing options...
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