Q: I Have a 2001 Infiniti QX4 and every time as soon as I start the car my AC blower’s start blowing air even when my AC screen is of

asked by on January 20, 2018

I Have a 2001 Infiniti QX4 and every time as soon as I start the car my AC blower’s start blowing air even when my AC screen is off and it only blows at the feet and stays on the whole time my car is on even if it’s on accessories it stays blowing and if I unplug the relay and stops. What’s making this happen?

My car has 143245 miles.
My car has an automatic transmission.

You may have a bad blower control amplifier and should try to replace it first. If still have issues then the main control panel may be having issues and can be tested with a scanner for failure codes and then further diagnosis can be done.

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

How do I check and top off the windshield washer fluid?
Your windshield washer fluid serves a couple of purposes. Obviously, it helps keep your windshield clean and free of dirt and grime, but it also helps with deicing in the winter (as long as you’re using a winter formulation). Keeping...
How do I switch between the rearview mirror day and night setting?
The rearview mirror has two settings: day, and night. The night setting is designed to reduce glare from bright headlights, and should always be used at night. It also provides less clarity, so it should never be used during the...
My truck is running rough
Having a rough running vehicle is never a pleasant experience. Unfortunately there can be quite a few reasons as to why your GMC is running rough for you. With the limited information, and not being in front of the car,...
Alternator/Battery
Hello. Make sure you are connecting the proper cables to the proper terminals (i.e. red cable to the positive bigger terminal and black to the negative terminal). The cables will naturally spark a little at times when you are connecting...
Engine starts up on cold start, shakes/struggles, and then shuts off.
Hello. I'm not sure what is meant by saying the O2 sensor and catalytic converter problem codes were not the problem. Several component issues could cause the behavior you are seeing - from a dirty, clogged, or failing idle air...
Bad fuel pump or another issue? 1992 GMC C1500
Hello - I agree with you that this is likely a fuel supply issue (https://www.yourmechanic.com/article/how-often-should-the-fuel-system-be-inspected). There are several possibilities as the source of the problem fuel pump or fuel pump relay (runs, but gets hot and fails), fuel filter clogged,...
I start the truck it runs but has no power when I start to move
This kind of reaction is often a sign of low transmission fluid (https://www.yourmechanic.com/services/transmission-fluid-service) or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's...
Rocker Arms
Hi Ricky. Thanks for contacting us today. Today's modern engines don't have older style; individual rocker arms. They are in an assembly (or multiple ones) that are replaced as a set if one is damaged. Intake rocker arm assemblies are...

Related articles

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...
The Best Used Cars to Buy If You Like to Go Off-Roading
Your Your best bet for off-roading is a 4x4 SUV. Depending on the model that pleases you most, though, you might have to shop around a bit to find a good used one. That’s simply because off-roaders typically become very...
Symptoms of a Bad or Failing Heater Bypass Tube
If you see coolant leaking under your car or smell coolant from your car, you may need to replace the heater bypass tube.