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A/C Blower

 
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xxsappixx
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PostPosted: Sun Apr 22, 2012 1:11 am    Post subject:  A/C Blower Reply with quote

Hey guys! I have been lurking around here for … I'm embarrassed to say it…years..lol Anyways lately my A/C has been doing something that drives me nuts. When I drive for say more than 15-20 minutes the blower motor starts to make kind of a funny noise. I feel cold air trying to come out of the vents but I feel no actual airflow. If I crank up the dial to 2-3-4 I feel a bit more air but its not right. I took out the blower motor and gave it a good cleaning but its still doing it. Now no air comes out on the 5 setting. Is it safe to say I have a jacked up blower motor and not resistor? Anything else that could go bad? The ignition switch got replaced and the actual A/C controls not too long ago.

Sorry for the long winded post..

XXsappiXX
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daedricprince
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PostPosted: Mon Apr 23, 2012 1:40 am    Post subject:   Reply with quote

had a similar problem and it was the resistor - my '3rd' setting did not work, and the other settings were fairly dim. got it fixed for under 100 and it works great now

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Billoftt
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2005 Chevrolet Impala


PostPosted: Mon Apr 23, 2012 9:20 am    Post subject:  Re: A/C Blower Reply with quote

xxsappixx wrote:
Hey guys! I have been lurking around here for … I'm embarrassed to say it…years..lol Anyways lately my A/C has been doing something that drives me nuts. When I drive for say more than 15-20 minutes the blower motor starts to make kind of a funny noise. I feel cold air trying to come out of the vents but I feel no actual airflow. If I crank up the dial to 2-3-4 I feel a bit more air but its not right. I took out the blower motor and gave it a good cleaning but its still doing it. Now no air comes out on the 5 setting. Is it safe to say I have a jacked up blower motor and not resistor? Anything else that could go bad? The ignition switch got replaced and the actual A/C controls not too long ago.

Sorry for the long winded post..

XXsappiXX


A similar thing happend to my 2005 last August. In the end, it was teh blower motor which is easy to replace and to check. If you have a voltmeter or electrical muti-tester, pull teh poer plug from the fan and test its voltage. It should read around 12 volts on the highest setting with the key on and the engine off, with incrementally smaller reading coorelationg to the fan switch setting. If your voltage reads okay, then replace the fan. If not, I have no experience on replacing the resistor or the switch, but testing the voltage would be the first stage of troubleshooting.

If you do not have a multi-meter, go to Harbor Freight with a coupon and you can get one for about 3 bucks.
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bigdog60
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PostPosted: Mon Apr 23, 2012 12:24 pm    Post subject:   Reply with quote

You did not say what year you have. They changed from a resistor to a module in late 04-05. If the fan is running and your not getting any air flow, check the mode actuator.Also try removing the HVAC fuse for a couple of minutes to see if it resets.

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xxsappixx
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PostPosted: Tue Apr 24, 2012 12:21 am    Post subject:   Reply with quote

Hey guys its 2001. I decided yesterday to do some probing with my multimeter and sure enough I got increasing voltages up to 5. Making me believe it was the fan. Picked one up from the auto part store and my car is now a freezer (very important living in Miami). The next big thing I got going on is I think I may need new catalytics (I notice some power loss, especially heading up hills on the turnpike). Fuel filter and pump are new. Gotta call GM and see if my car still fits into that extended warranty they offered for the cats. Unfortunately I think I know the answer for that.
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PushrodPower
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PostPosted: Tue Apr 24, 2012 12:42 am    Post subject:   Reply with quote

xxsappixx wrote:
Hey guys its 2001. I decided yesterday to do some probing with my multimeter and sure enough I got increasing voltages up to 5. Making me believe it was the fan. Picked one up from the auto part store and my car is now a freezer (very important living in Miami). The next big thing I got going on is I think I may need new catalytics (I notice some power loss, especially heading up hills on the turnpike). Fuel filter and pump are new. Gotta call GM and see if my car still fits into that extended warranty they offered for the cats. Unfortunately I think I know the answer for that.


Be sure too rule out other possibilities such as ignition (coil packs, plugs and wires, spark plugs) and MAF and MAP sensor issues etc. Catalytic converters are very expensive.

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2004 Chevrolet Impala
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PostPosted: Tue Apr 24, 2012 12:43 am    Post subject:   Reply with quote

xxsappixx wrote:
Hey guys its 2001. I decided yesterday to do some probing with my multimeter and sure enough I got increasing voltages up to 5. Making me believe it was the fan. Picked one up from the auto part store and my car is now a freezer (very important living in Miami). The next big thing I got going on is I think I may need new catalytics (I notice some power loss, especially heading up hills on the turnpike). Fuel filter and pump are new. Gotta call GM and see if my car still fits into that extended warranty they offered for the cats. Unfortunately I think I know the answer for that.


you only have 1 cat, if you replace it with an aftermarket unit, be prepared for the P0420 code to pop up. Some trigger it right away, some never do, some take some time. Only way to get rid of it is a tuned PCM with the code deleted, have someone with a tuner delete the code from your PCM, O2 simulator (if you can find one) or the anti-fouler mod.

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