Automotive Air Conditioning Information Forum (Archives)

Force1295 on Fri August 01, 2014 10:21 AM

Year: 2011
Make: Toyota
Model: Corolla
Engine Size: 1.8 L
Country of Origin: Japan

I have been experiencing an issue with my air conditioner on my 2011 Toyota Corolla. I can drive along fine and have the air conditioning work great. I find that at certain times that it "stalls". By stall I mean that it starts slow and then it speeds up. I can never guess when it's going to happen and there isn't anything interfering with the blower. I don't have any tools to know exactly what the compression is but I do happen to have a can of AC Pro leftover from last year. Any ideas?

mk378 on Fri August 01, 2014 10:47 AM

The refrigerant pressure won't affect the fan inside. Could be the motor going bad or other electrical problem.

Jag987 on Fri August 01, 2014 12:23 PM

Just trying to clarify, is it the blower fan inside the car that "stalls", starts slow then speeds up?

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I bought a can of 134a at w**-mart that had a stop leak, oil, and dye in it. It also had a hose and a gauge, so now I'm an AC pro!

Force1295 on Fri August 01, 2014 12:33 PM

Yes, the blower motor stalls and then picks up again.

Cussboy on Fri August 01, 2014 2:09 PM

Quote
Originally posted by: Force1295
Yes, the blower motor stalls and then picks up again.

Do you know this by the sound of the fan itself, or by decreased volume of air coming out the vents?

Jag987 on Fri August 01, 2014 2:27 PM

Have you checked the cabin air filter?

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I bought a can of 134a at w**-mart that had a stop leak, oil, and dye in it. It also had a hose and a gauge, so now I'm an AC pro!

Force1295 on Fri August 01, 2014 2:38 PM

There isn't a cabin air filter in the car. We had someone replace the filter during an oil change but he didn't have the right one so he jammed a wrong sized filter into the port. We didn't trust him and checked it out afterwards. He refunded the filter after some complaining but I just ran it without one. When it stutters, the air starts out as cool and nice. It then blows slightly chilled air like it's being labored under use. After a couple minutes (or seconds, sometimes it's brief), it catches up getting cooler and circulating the air better. It's never the same amount of time either. Sometimes it's immediately and sometimes it takes no more than 2-3 minutes.

mk378 on Fri August 01, 2014 3:51 PM

Usually you can see the blower motor under the dash without taking anything apart. The motor should have a 2 wire plug. Push the probes of a voltmeter into the back of the plug so you are measuring the voltage across the motor with it still plugged in. Then turn the system on and watch the voltage when the motor slows down. If it is staying near 12 volts but the motor isn't running full speed, the motor is bad.