Question about 1992 Lexus Sc 300

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95LexSC300 A/C display will not show anything i.e.(modes, temp..)

I can not get my heating or A/C on because the head unit/ display will only light up and not indicate anything.

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You need to replace the front glass and the bulbs. There 2 or 3 sites on Ebay that sell them or repair yours

Posted on Jan 10, 2009

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Check all your fuses.

Posted on Dec 23, 2008

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Is the cylnder head temp sensor and the cooliant temp sensor the same thing on a 2004 Lincoln ls 6 cyndler? Can't find the cooliant temp sensor everything redirects to cylnder head temp sensor even at...


cylinder head temp sensor measures the temp of the cylinder head metal itself and the coolant sensor measures the temp of the coolant only. the coolant sensor is mounted in the coolant and the head sensor is mounted only in the metal of the head and not into anything else. check with a dealer.

Feb 27, 2015 | Lincoln Cars & Trucks

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2001 chrysler town and country. A\C heat Blowers will not work when controlled my front main pannel. It is a auto temp controlled system. The rear blower will work but no heat when controlled by the rear...


Hi,
This may be similar to what I just fixed on an '00 dodge:
http://www.dodgeintrepid.net/showthread.php?t=89711

Accessing the Integrated Diagnostic System:

Procedure for Automatic Temp Control (ATC) equipped vehicles:

With the engine ON and the vehicle stopped set the temp to 75*F. Next hold down the Floor, Mix and Defrost buttons until the ATC display begins to flash. While the display is flashing, the system will run it's tests and calibrations.

When the display stops flashing, the tests and calibrations are complete.

The ATC display can only display one error code at a time. Any stored codes can be scrolled through by pressing the Panel mode button once for each code. DO NOT press any other button or you will have to start the test over. Note the codes and refer to the list below to determine what system is malfunctioning.

List of Climate Control DTCs:
23: Blend door actuator feedback failure (bad servo)
24: Mode door actuator feedback failure (bad servo)
25: Ambient temp sensor failure
26: ATC In Car thermister failure (ATC only, bad ATC head or ATC head disconnected while battery is connected)
27: ATC in car sensor failure (ATC only)
31: Recirculation door actuator stalled (stuck door or bad servo)
32: Blend door actuator stall failure (stuck door or bad servo)
33: Mode door actuator stall failure (stuck door or bad servo)
34: Engine temperature message not received (ATC only, bad ATC head or bus failure)
35: Evaporator sensor failure
36: ATC control communication failure (bad ATC head or bus failure)
37: Blend door actuator output shorted to battery (bad servo or wiring fault)
38: Blend door actuator output shorted to ground (bad servo or wiring fault)
39: Mode door actuator output shorted to battery (bad servo or wiring fault)
40: Mode door actuator output shorted to ground (bad servo or wiring fault)
41: Recirculation door actuator output shorted to battery (bad servo or wiring fault)
42: Recirculation door actuator output shorted to ground (bad servo or wiring fault)
43: Common door shorted to battery (probable wiring fault, could be a servo that failed in an odd manner)
44: Common door shorted to ground (probable wiring fault, could be a servo that failed in an odd manner)
45: A/C control blend door input open or shorted with respect to ground (MTC only, wiring fault or bad servo)
46: A/C control blend door shorted to battery (MTC only, wiring fault or bad servo)
47: A/C switch failure (MTC only)
48: A/C control mode door input shorted to ground (MTC only, wiring fault or bad servo)
49: A/C control mode door input shorted to battery (MTC only, wiring fault or bad servo)
50: A/C control electric backlite (EBL) switch fails (MTC only)

51: System voltage too low for calibration!!! (check battery cables, battery and alternator!)

Dec 10, 2014 | 2001 Chrysler Town & Country

1 Answer

Where is the heat sensor located?


On the side of head, possible bad sensor if car does not show temp high

Aug 09, 2014 | 2007 Chevrolet Equinox LS

1 Answer

Chevy climate control


it sure could be that head unit. if you want to clean the unit it might help. disconnect the battery, pop the bezel off the radio and head unit remove the four 9/32" bolts that hold the unit in the dash, unplug the head unit and spray it with computer duster.

Apr 03, 2014 | 2005 Chevrolet Malibu

1 Answer

2000 Grand Marquis .Heater continues to heat .after temperature is reached.


Run self test on heater control head if electric temp control. .key on, press off and floor buttons at the same time for 2seconds then release and press auto button for a second, ck what codes show on heater control head. Then Google the code. .probably the blend door actuator

Mar 06, 2014 | 2000 Mercury Grand Marquis

1 Answer

04 ram 1500 4.7, new radiator, fan clutch, water pump, thermostat, have flushed whole system, new heads, and intake. temp gauge still showing over heating. my lazer shows 180 - 210 . is sending unit bad?


Your sending unit is definately bad running at 180 - 210 is perfectly fine and it is not overheating at all.Replace it and your problems will be solved. But make sure you are using your lazer temp gauge at the same point as your temp sending unit.If you are then it is your sending unit if not you may have air in the system at the point of the sending unit and this will cause your problem as well.

Apr 30, 2011 | 2004 Dodge Ram 1500

1 Answer

I have a 87 with an elecronic heat and air controler,I can set temp going up, but not down.heat works great,But to good


The control head display will be needing a replacement. The button the lower the temperature is no longer operating correctly.
The control head is electronic with very small buttons on it if I remember correctly. These units were exchanged units at the Chevy Dealerships parts departments. I seriously doubt if they are still available although you can check. I know there are a lot of web sites that sell parts for Corvettes and they may have one for yours. I would GOOGLE your item and see

Apr 10, 2010 | 1987 Chevrolet Corvette

1 Answer

My A/C & heat- wont turn off. In Manual I cannot adjust the fan speed. The temp does change to the setting and when I push the off button it beeps, the display turns off, but just goes into automatic...


go to salvage and get a new used ac head to see if this helps .the head will become corroed at the connections in side ,i have taken them apart to see if i could clean them up with electric cleaner...

Oct 08, 2009 | 1996 Chrysler LHS

1 Answer

1999 VW Beetle outside temp display not working


For general awareness, the outside air temperature sensor is located above the inside mirror.
Try to reset the temperature measurement unit: 1. Switch engine on. 2. Press and hold clock minute (min) and hour (h) buttons simultaneoutly longer than 3 seconds. The display will show new temperature measurement unit. 

Apr 03, 2009 | 2000 Volkswagen Beetle

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