A/C blows hot air and compressor does not turn on

MARIEC2060

MEMBER
2011 TOYOTA SIENNA
6 CYL
4WD
AUTOMATIC
130,000 MILES

Van listed above is the Limited model. A/C blowing hot air and compressor not engaging. Not sure which relay is for the A/C compressor. It won't take Freon since the compressor won't engage. Not sure if it is the relay integration switch since I don't know how to check that. And I don't know how to jump the pressure switch since it has 3 slots. Pictures attached.
Appreciate your help.

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3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,663 POSTS

Hello,

There is an air conditioner amplifier that runs the compressor along with 7 fuses. here are the wiring diagrams for the system so you can see how it works and a guide to help you test for power:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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Tuesday, October 1st, 2019 AT 12:03 PM

MARIEC2060

MEMBER
2 POSTS

I took it to Toyota and they said that the fuses and relay are fine. They won't diagnose the problem for free. Any other suggestions?

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Thursday, October 3rd, 2019 AT 8:19 AM

KEN L

MASTER CERTIFIED MECHANIC
47,663 POSTS

Does the system have pressure? Here is a guide and a video to help us:

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

and

https://youtu.be/uZrQCGwXfek

Please run down these guides and report back.

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Thursday, October 3rd, 2019 AT 12:52 PM