| Author |
Message |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 301
Registered: 6-2002
| | Posted on Friday, January 10, 2003 - 9:23 pm: | |
Thank you all for your comments and help. I identified the source of my consternation, which was a cracked and broken vacuum line at the vacuum reservoir in the driver-rear engine bay (above wheel well). I replaced with new hose, and "voila", the system works as advertised.
Yes, the flappers under the dash are vacuum assisted.
Thank you.
Jim S. |
Lou B (Toby91)
Junior Member
Username: Toby91
Post Number: 111
Registered: 4-2001
| | Posted on Friday, January 10, 2003 - 3:24 pm: | |
When you say, "no air flowing thru windshield" ducts" do you mean the non round elongated ducts just under the windindshield? If so these are activated only by pushing the top button (#16 in the manual page I2). The footwell switches are at the rear of the center console with the display for each switch. The manual mentions electromagnetic valves. I never use these however since all I need is AC and windshield defrost in Florida. |
Michael N. (Man90tr)
Member
Username: Man90tr
Post Number: 747
Registered: 4-2001
| | Posted on Friday, January 10, 2003 - 1:21 pm: | |
Thanks Steve. |
Steve Magnusson (91tr)
Intermediate Member
Username: 91tr
Post Number: 1303
Registered: 1-2001
| | Posted on Friday, January 10, 2003 - 12:29 pm: | |
Michael -- As you said, the feet vent flaps are driven by small electric motors, but I was talking about only the AC flaps controlled by the circular pushbuttons -- sorry if that wasn't clear. |
Michael N. (Man90tr)
Member
Username: Man90tr
Post Number: 746
Registered: 4-2001
| | Posted on Friday, January 10, 2003 - 12:03 pm: | |
Steve,
About the vents down by my feet (heat for the feet), the ones controlled by the rocker switches that are the back left and right sides of the AC console -- aren't they electricaly controlled?
They are very adjustable across their range and even have little lights that tell their position. I don't get any sound or movement from them without electrical power and I am sure I hear a little electric motor moving when I activate the switch.
thanks.
Michael |
Steve Magnusson (91tr)
Intermediate Member
Username: 91tr
Post Number: 1302
Registered: 1-2001
| | Posted on Friday, January 10, 2003 - 11:55 am: | |
James -- the TR AC internal flap systems controlled by the pushbuttons are vacuum actuated/controlled (no electrons involved). Per Michael N.'s question -- if no flaps at all move when pushing the various AC buttons then check the main vacuum source first (IIRC you might even be able to access the incoming vacuum line under the passsenger side mat without having to get into the Tunnel -- but don't hold me to that). If some flaps seem to be working (you should be able to hear them moving even after shutting the engine off -- e.g., toggling between "off" and the middle button), and just the flap directing the blower output to the windshield vents isn't working, then this may require a Dash-ectomy (if the switch and lines in the Tunnel seem OKish). So which is it -- all flaps dead or only the windshield vent flap dead? |
Michael N. (Man90tr)
Member
Username: Man90tr
Post Number: 744
Registered: 4-2001
| | Posted on Friday, January 10, 2003 - 1:22 am: | |
James,
I am not too sure which vents you mean when you say under the dash, but here is my take on it. Are you talking about the louvers at your feet which are under the dash or the defrost vents that are on top of the dash? The ones down by your feet are electric (at least in the 1990 TR), but I assume you know that. The others are vaccum. You should hear movement of the flaps when you press the AC buttons with the power off. With the power off, if you press recirculate or regular AC and get sound and flap movement then that vaccum is fine. Press the defrost -- if you get nothing then I assume a stuck mechanism, disconnected vaccum or a disconnected switch on that control button. Are you feeling any resistance when you press the button? -- you should get a bit of resistance if not you might have a loose button in the console.
Hope this helps.
Michael |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 300
Registered: 6-2002
| | Posted on Thursday, January 09, 2003 - 10:25 pm: | |
1986 512 TR. Compressor and heater work fine. Air is cold/hot per specifications. However, air direction flappers do not seem to work under the dash. Issue became apparent when trying to defrost the windshield. No air flowing through windshield ducts. Is this a vacuum problem, control unit problem, mechanical flapper problem, etc.? Has anyone experienced this? I am trying to do my homework before removing dash to get at heating/cooling/airflow unit. All help appreciated.
Jim S. |