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Old 10-17-2015, 04:56 AM
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Another HVAC thread...

Bought my 2015 Grand Cherokee Altitude 2 months ago and seem to keep having HVAC issues. When I start the vehicle, the HVAC unit makes a cracking sound, which IMO you shouldn't hear in a brand new 2015 vehicle. The other issue is the A/C compressor sounds like it cycles on and off every 5 seconds which causes the "Darth Vader" hiss inside the cabin. Maybe related... the A/C was never that cold to begin with.

But something else I just noticed... when I have the air selected for Front Defrost and Feet, air is also blowing out of the driver side vent.

I already brought the Jeep to the dealer to check into the A/C compressor / hissing sound and the tech said "Normal operation".

I've owned many cars, and I KNOW no brand new vehicle should have these types of issues.

Can anyone suggest DIY fixes... or is another trip to the stealership in order?

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Old 10-17-2015, 09:56 AM
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Re: Another HVAC thread...

LOL... I don't care what year you're talking about, Jeep will never be remembered for its stellar HVAC performance on either the heating or cooling side.

Every vehicle I've ever owned (including non-Jeep) has had one performance quirk or operating peculiarity covering everything you mention above and more.

That cracking sound you hear is most likely the blend doors opening/closing to match what you have the HVAC set to do.

It's not unusual for the compressor to cycle on/off like that under certain conditions. My Accord does that... and what is most irritating about it is that it also kicks the overly loud electric cooling fan on/off at the same time.

Anytime you have a defrost setting on you're going to get a little air out of the driver/passenger side vents... even though there are dedicated side window vents in the pillars.

Other than the compressor cycling, my 8 year old Accord's HVAC system still cranks out cold air and heat when and where you want it... and it does it better than any Jeep I've ever owned.

I don't know if there are any DIY fixes for your complaints. And having the dealer mess with it may create more problems than will be solved.
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Old 10-17-2015, 07:52 PM
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Re: Another HVAC thread...

it may be your blend door actuator going...jeeps are terrible with that, I had 3 actuators fail in one month, 1 for the blend door under driver side dash, and both driver side doors lock actuators, all out of warranty
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