It will not switch from A/C to heat

2007 HUMMER H3
188,000 MILES • 5 CYL • 4WD • AUTOMATIC
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MIKEVOL4LIFE
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  • 1 POST
I do not know which actuator controls this, there are 3 of them. Are the same part number to order?
Apr 1, 2020 at 12:20 PM
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ASEMASTER6371
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Good afternoon,

According to Alldata, you have separate controls for each side. Are both sides not working?

https://www.2carpros.com/articles/replace-blend-door-motor

To be sure, is the A/C system working? Did you see if the compressor is engaging and can you check the pressures?

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

Roy
Apr 1, 2020 at 12:40 PM