Q: Q: Air flow in front vents

asked by on

I have an 03 Chevy trailblazer fully loaded... My vehicle recently died so I changed the battery.. The air flow in my front vents have considerably stopped blowing hard. I've done extensive research and I've tried pulling fuses and all kinds of stuff.... I read a lot about the blower motor resister... Should I replace that? Any ideas? By the way, when I put ac, or heat on the highest mode, it still doesn't blow hard. As well as if I were to lower the speed.
My car has an automatic transmission.

Try to look under the glove box to see if the air intake has got anything blocking the A/C air intake. If nothing is blocking the intake of the A/C, then you would need to have the blower checked to see if it is getting all the fan speed voltages from the blower resistor. If the A/C switch for the blower is working correctly, then you may have a blower motor or resistor that is bad. The most inexpensive repair is to replace the blower resistor first, and then replace the blower motor if needed. If you’d like, you can have your AC issue diagnosed at your home or office by a technician from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Air flow in front vents

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

Get a quote

What others are asking

Q: Will I have an issue with the law if I have my muffler and resonator removed and add a straight pipe on my 2002 trailblazer?

Hi, thanks for writing in. I'd be happy to provide my insight. You will have a problem with the vehicle noise levels to be above the legal limit. You may not have an issue with the law unless you rev...

Q: When i change a/c temperature pass 3. The truck shakes, idles and shuts off.

Hi there. Shaking with the a/c on can be caused by a number of reasons. The a/c compressor puts a lot of strain on the engine because the compressor is similar to being a small engine itself. When the a/c...

Q: My engine is shaky when I am at a stop and do not press on the gas pedal.

Hi There, It sounds like your car may have a bit of a misfire of some kind causing the shaking when you come to a stop. Shaking or vibration may be caused by many different things such as faulty spark...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...