My 2019 Jeep Grand Cherokee Limited, approx 70k miles, has had an ongoing issue with periodically reduced or non existent airflow (hot or cold) for the past 3 months or so (roughly Nov through Jan). I will have no air flowing out of any vents regardless of temperature or fan setting. At times when air is flowing, it is sometimes at a reduced level (lower than the indicated fan setting). There doesn't seem to be any consistent factor that determines whether or not the air will flow, but when it does not flow it cannot be made to flow in any way that I can find - changing settings or restarting the car does nothing. At other times, it seems to function normally. Typically, however, it will rarely stay working for longer than 15-20 minutes before air stops blowing. Driving above 50-60 mph may also be a potential trigger. I suspect the issue may have started as far back as October (4 months +) but went relatively unnoticed/ignored until it became a more urgent issue with the onset of western Pennsylvania's precipitous winter weather. (Not having windshield defrost on a 6 hour drive through freezing rain and snow tends to be a problem.)
I have at this point taken it in to two different Jeep dealerships in the hopes of correcting the problem: the first replaced the cabin air filter and flashed the hvac system, the second could not get the problem to trigger after driving it several times over a 1 1/2 day period (of course it worked fine on the day I brought it in), so attempted no repairs.
I haven't made any significant investigations of my own as I was hoping punting to the dealerships would be a more reliable solution. Now I am hoping to get some direction on the best way to proceed before I get too deep in it.
When air is not blowing from the vents, it does 'sound' like the blower motor is running. In my previous vehicle, a 2011 Laredo, I replaced both blend door actuators to correct an issue with hot air blowing with the a/c on and cold air blowing with the heat, but my current problem feels and sounds entirely different. Of what I have read on various Jeep forums from people have similar issues, replacing the blower motor fan, blower motor resister module, and relays haven't solved the problem.
(At roughly the same time as the airflow issue my vehicle has experienced a persistent drain on my battery that has yet (to my knowledge) to be correctly diagnosed - first dealer updated my radio and second has replaced my battery and replaced a fuse for my 12v front/console/rear outlets that also recently stopped working (may have been blown by the dash defrost fan I have been forced to keep on hand, which fuse coincidentally I had already replaced myself
). I don't know if the battery draw is caused by or in any way related to the air flow problem and neither dealer has suggested so in anyway but I feel it is worth mentioning.)
Any suggestions or related threads with solutions would be much appreciated.
The problem seems to grow ever more and more expensive and inconvenient.
I have at this point taken it in to two different Jeep dealerships in the hopes of correcting the problem: the first replaced the cabin air filter and flashed the hvac system, the second could not get the problem to trigger after driving it several times over a 1 1/2 day period (of course it worked fine on the day I brought it in), so attempted no repairs.
I haven't made any significant investigations of my own as I was hoping punting to the dealerships would be a more reliable solution. Now I am hoping to get some direction on the best way to proceed before I get too deep in it.
When air is not blowing from the vents, it does 'sound' like the blower motor is running. In my previous vehicle, a 2011 Laredo, I replaced both blend door actuators to correct an issue with hot air blowing with the a/c on and cold air blowing with the heat, but my current problem feels and sounds entirely different. Of what I have read on various Jeep forums from people have similar issues, replacing the blower motor fan, blower motor resister module, and relays haven't solved the problem.
(At roughly the same time as the airflow issue my vehicle has experienced a persistent drain on my battery that has yet (to my knowledge) to be correctly diagnosed - first dealer updated my radio and second has replaced my battery and replaced a fuse for my 12v front/console/rear outlets that also recently stopped working (may have been blown by the dash defrost fan I have been forced to keep on hand, which fuse coincidentally I had already replaced myself
). I don't know if the battery draw is caused by or in any way related to the air flow problem and neither dealer has suggested so in anyway but I feel it is worth mentioning.)Any suggestions or related threads with solutions would be much appreciated.
The problem seems to grow ever more and more expensive and inconvenient.
