I just bought a '98 Ranger SuperCab, and the fan fuction switch only blows air to the defrost & heater vents. The AC, heat and off positions work fine. I took off the glove box and observed that the door to the blower dosen't work when switch is turned. The heater door is activated by vacuum apparently. I'm not sure if the problem is electrical or mechanical. My main concern is that in the summer the AC won't blow out the dash vents. If anyone knows about this problem please answer this posting. Thank you, Glenn
I already posted my solution.
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I found the problem myself (amazing). I traced the vacuum hose from the switch to the engine compartment. What I found was a disconnected vacuum hose on the air intake near the air volume sensor. Also, there was a smaller broken vacuum hose branching off from the hose mentioned. So, if you have this problem, check all vacuum hoses under the dash and hood.
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