Climate control question re: '87 5kTQ

[Kneale Brownson]

The valves are plastic.  The PO probably replaced a plastic valve that
broke with a piece of pipe.  A/C won't turn on with the system set to
"econ".  But you might get cold air anyway because of a failure in the
system that controls the air flaps in the heater core box.  Check out the
climate control information on Scott Mockry's wonderful website:
http://www.sjmautotechnik.com/trouble_shooting/ac.html

At 08:30 AM 11/5/2004 -0600, Wallace Offutt wrote:
>Question for you folks:
>
>The previous owner of my '87 TQ for reason had replaced the heatercontrol 
>valve with a straight piece of pipe. When I found how cheap the valves are, 
>I figured there must be a reason for this... Well, now that it's getting 
>could out, I'm beginning to get an idea: the heat seems to always be on when 
>the system isn't turned on (but w/out the blower running), but when I turn 
>the system on (regardless of whether I choose econ, auto or what, and 
>regardless of what temp I select) the AC seems to turn on. I figure it might 
>be some module I read a vague description of that lies somewhere behind or 
>beneath the glovebox... any thoughts?
>
>Thanks,
>Wallace
>
>
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