Q: Cold air turns hot

asked by on February 08, 2016

The air blows cold, and then hot.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car overheating for some reason.
Hi there, there are several reasons as to why a car can overheat in traffic. Some of the things you mentioned are important context clues that may help rule some things out. The white smoke you mentioned NOT seeing is...
Antitheft light flashing on dashboard
It sounds like the ignition switch has gone amiss. There is an antenna built into it to detect the proper key. If that malfunctions, your Anti-Theft Light will come on. The key not turning is a different problem. It is...
AC blowing out warm air again
If this happened right after the work was done then you either have a leak in the system that allowed the refrigerant to come out or there is an electrical issue. It is possible that this was overlooked if the...
Window off track
Typically, when a window comes off its track, it is a good indication that a component within the system has failed. When it comes to your Saturn Ion, it may be a matter of removing the door panel and using...
My wheel bearings are making noise.
Hey there, thank you for asking about your 1996 Ford Contour. If your wheel bearings are noisy then you should have them checked to see which one is bad and replace the bearings. The front axle bearings are part of...
I own a 2000 mercury sable LS DOHC and yesterday I changed my cyclinder 3 coil and my car ran better then ever but I went to start
Hello. There are 2 likely sources of the white smoke - which is engine coolant getting into the exhaust system. The lower intake manifold gasket can leak coolant into the air intake and a blown headgasket - common on these...
What are the wires connected to coil pack called?
Hello, thanks for writing in. The connectors you are referring to are commonly called the ignition coil pigtails, or simply ignition coil connectors. In some cases the damaged connectors will still plug in and allow the coil to function correctly....
Temperature fluctuates up and down
The coolant fan switch (https://www.yourmechanic.com/services/cooling-fan-relay-replacement) helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time...
My remote won't unlock or lock the driver side door but opens the other doors.
Hi there. When this issue occurs, it's typically caused by an electrical short or damaged fuse which supplies electricity to the power door lock. The best way to know for certain is to have a professional mobile mechanic come to...

Related articles

Does Running My AC in the Summer Keep My Engine Cooler?
When When you engage your air conditioning in your car, it is usually summertime and hot outside. Air conditioning serves to remove heat from the inside of your vehicle by circulating a refrigerant through the evaporator core in your dashboard,...
How a Car's Heating System Works
The The sun sets, and the air has a chill. You pause to flip your jacket collar up, and you walk briskly to your car door and slide into the driver's seat. Once you start your car, it’s only moments...
P0539 OBD-II Trouble Code: A/C Evaporator Temperature Sensor Circuit Intermittent
P0539 means the A/C evaporator temperature sensor has a too high/low voltage signal, usually caused by a faulty evaporator temperature sensor.