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cab ac blowing hot while sleeper blowing cold

This is a 2006 International. Front ac blows but is warm air. The sleeper is blowing cold. Checked the fuses all are good.

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Check under the passenger seat.The thermostat control module might be bad or stuck in the warm/hot position.There are two thermostat controls under there,front and back.See if this helps you.

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is there a valve on the engine side that needs to be turn off?

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Pulled the passenger seat. Found that the door that switches between warm and cold air was hanging up. The plastic floor on the ac cage was bowing up. Put a screw in it out of the way of the door and all is good now.

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Greg30312 will be eternally grateful.
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