Is the rear a / C blowing only hot air?

I have a 2017 Premier II with rear a/c controls. Front a/c blowing good and cold, rear blowing only hot air, regardless of rear temp setting. Tried it with Sync on, and no change for rear a/c. Am I missing something, or is a visit to the dealer in my near future? Definitely go to the dealer.

Why is the air blowing out of the back of my car?

Changing temp setting on passenger side to lowest setting, no effect. Still blowing hot air. Also, without warning, air starts blowing out of top dash vent (that clears windshield fogging), and no air at all through driver side or passenger vents. Rear air still blows correct temp air.

How does the AC vent in a car work?

However, if your car is from 85 or newer then the AC vent will be linked to heating, cooling, and outside air. Here is how a typical system works. When it’s hot out, air is blown over the AC evaporator before it’s sent to the cabin.

Where does the hot air from the AC come from?

Hot air comes from the vents when the AC is off due to ducting “gains” (heat we are talking about). Your HVAC ducts are likely a big snake across warm components, around a heat exchanger and very close to it.

Why does my car AC vent blow hot air when driving even?

Hot water is always present when the motor is running. There will always be some heat in the radiator/heat exchanger. When the heat is on there is hot water flowing but even off there will be some conduction in the water. If you are feel a significant amount of heat and it outside vent is closed, you might have a leaky heating valve.

Are there any cars that do not have AC vents?

Most cars do not have AC vents, only climate control vents. Which means that they blow what ever air is selected. There are exceptions. I had a 1980 Ferrari that did not come stock with AC.

What causes hot air to flow in the passenger compartment?

The ram air flow from vehicle speed would cause hot air to flow in the passenger compartment at all times, Even with the blower motor commanded OFF. On the system described, one open, damaged or disconnected vacuum line coupling (usually located at the main HVAC supply line at the firewall) would cause the complaint described.

Why does my Chevy Tahoe blow hot air?

I leave the rear air on auto for both fan and vent control and just leave it at 70 on the temp. If this does not work, there are some threads on here about replacing the actuator or manually resetting. I have a 2002 Tahoe that is having some problems with the rear a/c.

Why does the a / C blow hot in my GMC Yukon?

I have a 2002 GMC Yukon and the A/C in the dash blows cold but the rear A/C blows warm. Does anyone know what could be the cause of this and how to fix it. Click to expand…

Why does the rear AC blow warm air?

I have heard of that issue on another acadia also. There are a few things you can do. Try turning the temperature control of rear system and see if it blows hot air when you turn it to full hot position. If that works, please reply back and there is a quick diagnosis that you can do to figure out the problem.

I have a 2002 GMC Yukon and the A/C in the dash blows cold but the rear A/C blows warm. Does anyone know what could be the cause of this and how to fix it. Click to expand…

What’s the difference between the front and rear AC?

It was about 80 degrees outside and my ac temperature settings were at 65. You could really feel the difference between the front and rear. Try turning on the rear controls but did not help either. Anyone else experiences this issue. :help:

Why is the front vents warm but the rear vents are cold?

The gauge showed that the system was low and I started to fill the system. The compressor clutch did turn on and the system is currently at 45psi (fill zone). Now, the rear vents is blowing cold air but the front vents is still blowing warm air.

Why is the rear AC warmer than the front?

When the rear ac is turned on only, the air isn’t that cold. But when the front ac is turned on, the rear ac is blowing colder air out the vents. That’s because the rear AC by itself can’t turn the compressor on… The front AC has to be on for the compressor to turn on….

Why does the rear air blow warmer than the front?

The rear air blows out much warmer than the front when the air conditioner is on. We have the Auxillary switch on. From the rear controls we can make the air warmer but the air is still warm on the coolest setting. We took it to the dealer and the Tech said there’s nothing wrong with it.

Where does the AC blow warm air from?

After reading this thread I sat in the back seat and tried the rear AC. The air blows cold from the roof vents but when I change it to the lower output, I don’t feel anything. It looks like there are vents under the front seats, but it dosen’t feel like anything is coming out from these vents.

Why does my GMC AC blow cold air?

The air blows cold from the roof vents but when I change it to the lower output, I don’t feel anything. It looks like there are vents under the front seats, but it dosen’t feel like anything is coming out from these vents. Am I looking in the right place for the lower vents? After reading this thread I sat in the back seat and tried the rear AC.

Why does the AC blow cold air on the driver side?

Crank the vehicle without touching the climate control panel for one minute. After this try using the AC to check if it blows cold air on the driver’s side. If it is operating properly, the problem is with the actuators. If it is not working, the climate control panel is faulty. What could be causing climate control problems on the Buick?

What could be causing climate control problems on the Buick?

What could be causing climate control problems on the Buick? Case Details: No air from the dash, fan does not start, AC and heat is inoperative. If this is an automatic climate control, to confirm what the issue is, when the blower is not working, it should be unplugged and the black wire tested to verify there is no resistance to ground.

What to do if your climate control is not working?

Instead a communication wire passes through all modules informing the HVAC module how the lights should be operated. However, since the problem exists only with the HVAC, it is the component to blame. The solution is to replace the HVAC control module since the lights are internal and cannot be replaced.

Is the front of my truck warm or cold?

The front and rear where blowing warm air with the temps set at 60 degrees max. Today, I decided to purchase the EZ-CHILL from Advanced Autoparts to recharge my system (low-side).

Why is the heater in my car blowing out cold air and not?

The problem with the heater on the Vauxhall Corsa (as well as the Renault Clio) is often that there is no power from the heaters at all. This issue has nothing to do with cold air coming out instead of heat. This loss of power is also a common issue on the Renault Clio.

Why is the Vauxhall Corsa heater blowing out cold air?

What to do if your heater is blowing cold air?

If your heater is blowing cold air, and it’s not one of the first two possible explanations on this list, then you’ll need a specialist to at least come and take a look. You might be able to tell if your ducts have a leak, but fixing them is another issue.

Why is my a / C fan blowing hot air?

Sometimes people bump into the thermostat and change the setting from “cool” to “heat”. A more common mistake (and the one he made!) is changing the fan from “auto” to “on”, which causes the fan to blow air when the system isn’t running.

Why does my Dodge Grand Caravan blow hot air to the rear?

It sounds like maybe a bad passenger zone actuator in the HVAC controls causing the issue up front. As for the rear, that could be another actuator. I think there is a separate evaporator for the rear, it could have a clogged expansion valve or a leak. If it’s leaking, you should lose the front A/C fairly soon.

Where does the hot air come from in a Ford E350?

Hot air blows out of the lower Previously, in my E350 Van, the back upper vents blasted hot air when the front AC was on. I replaced the rear blend door.

Is the rear a / C blowing only hot air?