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A/C would blow cold for 2 to 3 minutes and then start blowing warm

Tiny
HOGFISH823
  • MEMBER
  • 2009 DODGE RAM
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 257,822 MILES
A/C would blow cold for 2 to 3 minutes and then start blowing warm for the same amount of time. Then it would start blowing cold again for 2 to 3 minutes alternating back and forth. It did this for several weeks. Now it just blows warm/outside temperature air. I have changed all the actuators in the dash and they are working. I can change the direction of where the air blows out of as well as heater works. It just does not blow cold air.

The fan closest to the radiator does not turn on so that might be an issue. The TIPM might be the issues as well but I don't know how to test that.

Any thoughts on what might be the problem as well as how to test the TIPM?
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Tuesday, January 7th, 2020 AT 6:49 AM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Do you have a set of gauges to give me the pressures when it is running? Let us see if the system is working correctly.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Does the fan kick on as soon as the AC is turned on?

Roy

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Friday, April 23rd, 2021 AT 9:41 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
When the AC blows warm can you open the hood and check the large AC line headed out from the firewall to see if it is cold? We are trying to see if the compressor is the issue or the temperature actuator. Please let us know. Please go over the guide above.
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Friday, April 23rd, 2021 AT 9:41 AM

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