Q: Have heater for the front window while air conditioner is off

asked by on August 28, 2016

We can feel the heat blowing from the vent for the front window while the air conditioner is off. We feel that the wider the window we open, or the faster we drive the car in the winter day (not sure about summer), the stronger the heater blows. But we are sure that the air conditioner button is off. While we are having the air conditioning (at around 22 degrees), we do not feel it that hot, and the wind is not that strong either. So we are wondering that if it is the issue from the air conditioning or the heat is actually from the engine.

My car has 52000 miles.
My car has an automatic transmission.

AC is not working Inspection $96.46 - $106.46 Get a Quote

The heat is from the heater core of the engine. You are feeling the air that comes in from the fresh air intake vent for the A/C heat system just below the windshield on the outside. This is normal and default for defrost when you have turned it off but it should still seal heat from getting to the windshield. The problem is that the blend doors in the evaporator heater case are not sealing 100 percent. It’s possible for this to be a normal condition for Jeep Liberty’s. If you feel like it’s still an issue, I suggest contacting a certified technician, like one from YourMechanic, who can diagnose the issue with your A/C firsthand and help you fix it accordingly.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

How do I adjust the power liftgate?

The power liftgate has three modes: 1. OFF. In this mode, the power liftgate is deactivated, and the trunk can only be opened manually. 2. MAX. In this mode, the power liftgate is activated, and the trunk will open to...

Vibration issue when going 60mph and up. Speed related.

Shaking or vibrating at high speeds is often times related to tires that may be out of balance, low on air, potentially a badly aligned front end, failing suspension components or ball joints. When any of these things are not...

Vehicle stall while driving. Crankshaft Position Sensor and Coolant Temperature sensor replaced.

Was the output of the crankshaft position sensor viewed on a scope? If not, the sensor might have been perfectly good. If you are working off of codes please note that the mere presence of a code is not enough...

Is it bad when oil gets into the throttle body?

Hello, I believe what you are describing is a problem with your PCV valve. A bit of oil in the throttle body is not going to harm your motor and is certainly not going to cause it to blow up....

P2181 cooling system performance error

Once you verify the thermostat and cooling temperature sensor is operating normal then you should have the PCM reprogrammed following technical bulletin 18-032-11. The bulletin will reprogram the computer to a new calibration so it is not as sensitive the...

How do I use the remote start comfort system?

The remote start comfort system allows your vehicle to set comfort settings for you when you use the remote start system. That way, when you turn on your car before you’re in it, your car is optimally set for your...

Car won't start up after changing injectors

Hi there. Thanks for contacting us tonight about your Jeep Grand Cherokee's starting problems. In most cases, sticking with the OEM replacement parts will produce the best results. This is especially true in regards to fuel pumps and fuel injectors....

Smoking a lot and oil in the intake manifold

Thank you for your question about your 2003 Jeep Liberty. An oily, water vapor laden mist continuously flows from the engine's PCV valve to the intake. In some engines, a significant amount of the oil vapors will condense back into...

Car will not pick up until easing off the gas pedal, Infiniti G25

Instead of using a conventional mechanical throttle, your vehicle uses a "drive-by-wire" system. This design, throttle position, and accelerator pedal position are relayed to the control module via dedicated sensors. The control module then uses this information to control a...

Related articles

A Buyer’s Guide to the 2012 Dodge Grand Caravan
When When you were a kid, almost every family you knew had a Dodge Grand Caravan. However, thanks to the rise of SUVs, CUVs (crossover utility vehicles), and sport wagons, this model has lost a lot of ground over the...
A Buyer’s Guide to the 2012 Acura MDX
The The Acura MDX is one of the favorite SUV among consumers. It has room enough for seven passengers, has great handling, and is accommodating to all types of weather conditions. With its advanced technology and performance capability, it is...
Signs of a Bad or Failing AC Compressor Relay
Common signs include inconsistent cooling, not hearing a click from the compressor turning on, and no cold air.