Skip the auto shop - Our mechanics make house calls

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.

A: Try to look under the glove box to see if t...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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・Save up to 30%

Get a quote

What others are asking

Q: Tail lights signal hazard

Hi there. In order to properly diagnose this, I would need to do some voltage tests to see where the voltage is being lost. It sounds like the switch may be failing again or it may have a bad hazard...

Q: Can't start, hot relays

It could be that the fuel pump is worn and drawing enough current to get the relay hot, causing it to fail. Fuel pump failure is quite common on vehicles such as yours, so if three mechanics have told you...

Q: Back power window not working

Hello. If you have one window that stopped working it is typically caused by a window motor or regulator. These typically need to be replaced together. I typically remove the door panel and check to see if there is power...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...