RE: AC programmer ?s

[Steve Brehm <sbrehm@sover.net>]

Hi guys,

I've been following this thread since my 87 5KCST is doing the same thing; no center vent air. I'd like to rule out the heater control valve before i dig into the ac controller. i checked all the usual vacuum leak spots and they seem o.k. How do I check out the heater control valve? I tried the golf tee method as Pablo suggests, but i can't get any movement out of the vavle at all. does this mean it's broken?

Does the Bentley (or anybody on the list) have a good, comprehensive sort of flow chart/diagnostic procedure for climate control problems?

--Steve

snip--------
Yor programmer is suspect....but I would GO! after a vacuum leak before
anything else....
In the engine compartment look for Heater Control Valve (rear of engine
Two Heater type hoses and one vaccum hose attached...disconect vaccuum
hose...plug with golf tee.....start engine....air from center vents ???
Yes.... replace small vaccuum hose from plastic tube to heater
valve....if valve "sucks in" and holds you are ok otherwise suspect
Heater Valve...
Test for center vents flow.... Not yet ....keep Golf tee in place....
At engine compartment....carefully remove passenger side winshield wiper
arm....
Remove large plastic cover.... clips close to winshield...and rubber
grommet all accross engine compartment. Pull evenly and slowly do not
jerk plastic is brittle...
Look for "TEE" (no golf) with 3 vaccuum lines... replace the two shorter
ones....
Test again....center vent flow....celebrate.... no.....
Send me anothe message to get deeper into surgery
Good Luck
Pablo