Question about 1992 Lexus Sc 400

1 Answer

1992 Lexus SC400 No Heat, AC, Defrost (mode controls)

The problem:
1992 Lexus SC400
I was running the car with the heat blowing and I plugged in my 12v Garmin GPS into the cigarette lighter. The heat stopped. When I try to turn on the mode controls nothing shows up on the LCD, no air is coming out of the vents, none of the AC, defrost buttons are working. The green background of the LCD is on but it does not show any mode controls.

All other electrical systems seem to work fine. I checked the AC/ defrost fuse in the driver panel fuse box, it is ok. I bought a new heater relay, that didn't work.

Is there a simple fix . The Lexus manual does not have any information about the relays, just the fuses.

Posted by on

  • cris51 Mar 01, 2009

    Mine is a 94 sc400, the heating/ac system will not respond. All other switches and electronics are working.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Change the 15amp fuse in the kicker fuse panel labeled cig. My stopped working for the same reason.

Posted on Nov 18, 2013

  • Ralph Eus
    Ralph Eus Nov 18, 2013

    Change the 15amp fuse in the kicker fuse panel labeled cig. My stopped working for the same reason.

×

6 Suggested Answers

MomsyKat
  • 52 Answers

SOURCE: cigarette lighter stopped working

Being a Lexxus the cig lighter might be a very slight different size than the plugs you are trying to use. Does the lighter work to light cigarettes (or does it glow hot after being pushed in)? If it works then it's not the fuse. If it doesn't work, try the inner fuse box-the fuse box is located to the bottom left of the steering wheel behind the little change drawer.

Posted on Aug 08, 2008

  • 60 Answers

SOURCE: CIGARETTE LIGHTER

It could be as simple as a blown fuse, could also be a bad socket or bad connections.

Posted on Jul 23, 2008

  • 1986 Answers

SOURCE: How do i change 12v power / cigarette lighter! in a Peugoet 206

The cigarette lighter is connected to a harness that's being the unit. You need to most likely remove the panel that the cigarette lighter is attached to in order to remove the lighter unit out. Once the unit is out, disconnect the wiring harness to exchange it. I don't know how exactly your lighter will come out

Posted on Aug 25, 2009

  • 1 Answer

SOURCE: air conditioner not wokring on 95 lexus sc400

Seems to me that the a/c control panel unit is not responding. You probably need to replace it ($150-200).

Posted on Nov 29, 2011

markmayes66
  • 786 Answers

SOURCE: all my ac and heater controls (including fan) and cig lighter stopped working on my 93 lexus sc400...fuses are good...not sure of relays...any ideas?

you can have relays checked if not sure.......

Posted on Aug 22, 2012

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

98 carolla heater blows cold ,I flushed system replace t stat check flow switch its working. when defrost, heat lever in heat position air blows out ac vent.


The mode selector is bad. IF you look at the plenum (where the fan motor is ) you should see two levers one is hot cold the other is mode. Check them by moving the controls and see if they move.
If the mode lever moves then the door on the inside is broken or something could have fallen in the vents and is blocking it.

Jan 15, 2016 | AC Cars & Trucks

1 Answer

Malibu heating and ac


does the car have automatic climate control?

Apr 05, 2014 | 2005 Chevrolet Malibu

1 Answer

My heater and ac only blow through the defrost


the actuator to the defrost door is inop. try running the climate system thru all the modes ac heat defrost vent off etc, maybe it will begin operating . look for any vacuum leaks

May 03, 2013 | 1997 Lincoln Town Car

1 Answer

The compressor clutch ti is engaging with heat mode, normal?


Depends.
The compressor will run when the control is in defrost, but should not in heat mode. In defrost mode the compressor runs to dry the air blowing onto the windshield.

Dec 13, 2012 | 2003 Toyota ECHO

1 Answer

My heater does not blow in floor in a dodgeram 1500


the heater vacuum motor and lines needs to be checked.Also get the blend door checked.

NO HEAT ON FLOOR VENTS

---------

As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------

No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html

-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | 2006 Ford Taurus

1 Answer

I have a 1992 Lexus 400 sc and the heat blows cold,It blows fine but only blows cold. The car is in good condition, over 200,000 miles. I drove it from California last year so I never knew about the heat...


see if the feed pipes are hot ,if so then its a fault with the operating flap control ,1992 it could be a cable and not vacumn ,just cannot remember all the cars i work on sorry

Dec 24, 2010 | 1992 Lexus Sc 400

1 Answer

A 1992 lexus es300. the fan appears not to be blowing.


you need a FAN temp control switch or relay or run a toGGl switch

Feb 28, 2010 | 1993 Lexus Es 300

1 Answer

Ac freon


Hello,
That shows to be 1.9 to 2.2lbs of R12 refrigerant.
That would be 30.4 ounces to 35.2 ounces. That's R12. Not R-134A


Apr 04, 2009 | 1992 Lexus Sc 400

1 Answer

Heat wont blow through heater or defroster vents


common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Jan 18, 2009 | 1997 Chevrolet K1500

Not finding what you are looking for?
Cars & Trucks Logo

1,098 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

63291 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Lexus Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...