I am not getting any cool air out of the front vents with temp set on cool and selector on vent or A/C. I am getting heat. The A/C compressor is cycling on and off around 26psi and 46psi. The truck has a rear A/C unit and it is blowing cool air. So I assume the A/C is working but the blend door is somehow stuck on heat.
Does anybody know how to access the blend door mechanism? Is it vacuum or electronic? Is it accessed through the engine compartment or under the dash passenger side? Should I remove the control from the middle of the dash and check it? (The valve that closes off outside air for max A/C is actuated by vacuum and appears to be working as I can see it actuate and verify vacuum to the motor.)
Any help would be appreciated.
1993 Ford E350 5.8L, 68K
2002 Ford E150 4.2L, 85K
2006 Chevy Aveo 1.6L 215K
2013 Kia Reo 1.4L, 101K
7500 OCI, M1 5-30 winter, M1 10-30 summer