Question about 1991 Lexus LS 400

1 Answer

1991 Lexus LS400 A/C not blowing cold, CD player and clock out plus auto air control ken

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,272 Answers

If the ac is working but not blowing cold then it could be ac relay problem.Check out/ What is happenning is the AC Mag Clutch Relay is tripping, You need to replace that which is located in the Fuse Box. These is a TSB # EL009-05. The indication would be if you observe the A/C light flashing when the trip happen from cool air to normal room temp. The Part number is 90987-02028. And the old part number is 90987-02022. Another possibility is hole in the ac condenser. allot of aircons have a thermal control to turn extra fans on too cool the aircon radiater, if this relay fails the aircon will run hot, the faster u run the engine, the hotter it will get, if the system gets too hot , the internal gas pressure will rise dramatically and blow a leak somewhere, or a hole in the condenser. Another possibility is refrigerant leak. Make sure your refrigerant has not leaked out.Get the ac pressure test done.It can be done at any local car garage.It will confirm if there is a refrigerant leak in the system. For cd player and clock not working.Its connections in the dash and fuse in the fuse box under the dash needs to be checked out to confirm the faulty. Thanks. keep updated for any more can rate this solution and show your appreciation.

Posted on Aug 02, 2010


1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Car doesn't respond when gas pedal is pushed when it is driven in hot weather; engine does not stall (1991 lexus ls400

I had the same problem with my 1992 LS400. My Lexus mechanic fixed it by replacing the MAF(Mass Air Flow).

This used to drive me crazy when the weather was hot.

Oct 25, 2010 | 1991 Lexus LS 400

2 Answers

My lexus ls400 1991 the two electri fan all time is on

Either the temperature sensor on the radiator, or the relay is bad.
Pull a wire off the temperature sensor on the radiator.
If it stops the fans, then the sensor is bad and the relay ok.

Jul 19, 2010 | 1991 Lexus LS 400

1 Answer

Heater blows cold 91 lexus ls400

Sounds like a thermostat problem replace it

Jan 23, 2010 | 1991 Lexus LS 400

1 Answer

My lexus ls400 was running hot and will not start

Check the oil for coolant cross mix (milky color on the lower part of the dip stick.
If your cengine has over 140,000 miles then it can be a blowing head gasket.
The only way to check it is via cooling system pressure test or dye test.
=== Follow this LINK to my FIX IT Check list.
or BOOKMARK IT and check it out when you are in front of your car

Mustgo Fixya AUTO Guru

Jan 11, 2010 | 1991 Lexus LS 400

1 Answer

My 1991 Lexus LS400 is beginning to have a smoking problem. Whenever I start the car (whether cold or hot) it will emit smoke (small cloud, but getting larger) from the rear mufflers. (smoke smells like...

depending on the color of the smoke,but try a few gas treatments.after ur next fill up,but a gas treatment n fuel tank&take her on the interstate and open it up(drive fast within speed limit lol).

Nov 09, 2009 | 1991 Lexus LS 400

1 Answer

Instructions on how to replace all wheel bearings on my 1991 ls40

Might want to chk.web sites from all major auto parts stores, like napa, auto zone, advance auto, ect. If nothing there i think chiltions has a web sites to, that might be able to help you.

Apr 01, 2009 | 1991 Lexus LS 400

1 Answer

AC blowing heat and air at same time

Yeah Ron, the flap that covers the heater core is open and when you're moving the air is pushed over the heater core and into the cab your in. Possibly just a vacuum line of that controls said flap. Check all vacuum lines for good proper connection to these flaps because all of them are vacuum actuated.

May 03, 2017 | 1993 Lexus Ls 400

2 Answers

Lexus LS400 1996 heater not warm

Check your coolant level sounds like it might be low.

Nov 20, 2008 | 2005 Lexus LS400

Not finding what you are looking for?
1991 Lexus LS 400 Logo

Related Topics:

453 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts


Level 3 Expert

76109 Answers


Level 3 Expert

896 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides