Question about 1992 Cadillac DeVille

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1992 Deville, no heat. trouble code is telling me that the air mix door is malfunctioning. Where is it located and how do I get to it

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Hello: The actuator for the air mix door has probably failed (high failure rae item) Remove the glove box and the passenger side hush panel(on bottom of passenger dash) Turn key on (engine off) You will see a silver rod coming from the actuator going to the arm on the door. Run the temp from 60 to90, the rod should move, if it doesn't the actuator is bad. The actuator is mounted on top of the programmer. This should help you.

Posted on Nov 06, 2010

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Posted on Jan 02, 2017

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How do I check vacuum system for 92 Cadillac devill climate control system?


This problem is most often caused by the air mixing valve (usually its actuator has stopped working - fails in the cold position) so I would start there. Not sure about a 92 - could either be an electrically or vacuum controlled actuator. You can check vacuum at the HVAC control unit with a vacuum tester.

Jan 05, 2017 | 1992 Cadillac DeVille

1 Answer

REPLACING ac heater programmer in my 1999 cadillac deville


Why ?
Programmer Description
The heater and A/C programmer is attached to a bracket. The bracket is located next to the right end of the heating, ventilation, and air conditioning (HVAC) module assembly, behind the glove box. The heater and A/C programmer provides the controls for temperature regulation.
The heater and A/C programmer controls an electric actuator. The electric actuator adjusts the air mix valve position in order to blend cold and warm air. Vehicles with dual zone (CJ2) have 2 electric actuators that mix the air independently of each other. The motor is reversible and moves a rotary shaft which drives the air mix valve link. The motor also provides a position sensor signal in order to monitor the actual valve position.
The heater and A/C programmer operates the 4 vacuum solenoids. The solenoids control vacuum to the various vacuum actuators. The vacuum actuators control the following components:
• The air inlet valve
• The A/C DEFROST valve
• The UP/DOWN valve
The heater and A/C programmer also controls the park brake release actuator. The powertrain control module (PCM) sends a Class 2 serial data message to the heater and A/C programmer whenever the transmission is shifted out of PARK or NEUTRAL. The heater and A/C programmer will then supply vacuum to the park brake release solenoid, which releases the park brake.
The heater and A/C programmer sometimes is referred to as the air control module (ACM). This reference is commonly used by a scan tool and by the diagnostic trouble codes (DTCs).
.

Dec 20, 2016 | 1999 Cadillac DeVille

2 Answers

Got a1997 cadillac deville got heat on passengers side no heat on drivers side could you tell me the problem.no defrost on drivers side either help please


DTC B1340 Air Mix Door #1 Movement Problem !
The heater and A/C programmer supplies voltage to an internal motor that drives the air mix door. The heater and A/C programmer monitors the air mix door position feedback from a sensor on the motor. If the air mix door is requested to move but the feedback voltage does not change, the heater and A/C programmer will store DTC B1340. If the air mix door feedback indicates that the feedback is near the hot or the cold extreme, the DTC will not set. Evaluate the operation of the air mix door through self diagnostics as described in the test description.
Test Description
Perform the Diagnostic System Check before continuing with the diagnosis of this DTC.
A Scan Tool allows for the direct control of the air mix door by observing the following conditions:
• The air mix door position feedback value
• The value`s difference from the air mix door commanded position value
These readings indicate a fault internal to the heater and A/C programmer in the air mix door sensor feedback.

Did you perform the Diagnostic System Check?
--
Go to Step 2
Go to Diagnostic System Check
2
With the engine running, connect a Scan Tool .
Turn the dual zone to OFF (passenger temperature offset at 0 or OFF).
Exercise the suspect actuator using the temperature control on the control assembly.
Is the door being commanded (COM) to the proper high and low values?
COM High 100 %
COM Low 0 %
Go to Step 3
Go to Step 4

If you are unfamilier with this , i suggest you take it to a ASE certified repair shop or the dealer .

Jan 25, 2016 | Cadillac Cars & Trucks

1 Answer

1992 Cadillac Deville blowing air but not heating?


There is a damper (basically a door) in the heater unit that is probably not being actuated. This damper allows the air from the blower to be sent over the hot heater core and thus warming the car interior. This damper might be either vacuum controlled or electrically controlled. My 1992 Blazer had vacuum lines that went to it. It could be that you have the vacuum lines loose under the dash. Look for loose hoses or connectors and see if you see an obvious place they might plug into.

Dec 16, 2011 | 1992 Cadillac DeVille

2 Answers

My heater on my 1995 cadillac deville blows cold air on the drivers side and warm on the passenger,what do i tell a mechanic when i take it in? just that? I've felt of the hoses under the hood and all are...


I am a mechnaic and I would suggest you tell them exactly what you just wrote. Based off your description I already have a good idea what is wrong. There are a series of doors located behind the dash that control the quantity and temperature of the air coming out of the vents. The blend door for the passerngers side of the vehicle has malfunctioned. This could be the motor that controls the door or even a broke or stuck door. The dealers scan tool can be used to determine if it is an electrical malfunction or a meachnical malfunction but in most cases this requires getting behind the dash. Hope this helped.

Mar 25, 2011 | 1995 Cadillac DeVille

2 Answers

What are these codes for 92 cadillac deville ff,f40,f,e,e48,e52,ee,888,70?


Hello williamcole7: My name is Roger and I will help you. The code 888 is a test code. This tests the L e d's of the dash cluster. All segments must light so you can read all numbers. The 70 code means the system is ready and able to function. The ff code is a current BCM code and is happening at the moment. The f 40 code is a BCM history code and means it was a stored problem or something that has happened. The f 40 code is for a air mix door problem. THe BCM would set this if you had an A/C problem. The E 48 code deals with the EGR system fault. I would check for a vacuum leak at the EGR solenoid. The hose is prone to deterioration do to heat from the engine. Code E52 deal with loss of voltage. A dead battery or a disconnected battery cable will always set this code. None of these codes will keep the car from running.The repair schematics are to extensive to send in a reply. Should you need further help ao assistance I will be glad to help. Please rate the answer. Thank You for using Fix Ya. Roger

Mar 24, 2011 | 1992 Cadillac DeVille

1 Answer

I have a 1999 Cadillac Deville Concorse. The climate controls are all on the dash below the radio. The drivers side works perfectly (both hot and cold), but the passenger side works intermittently. If I...


Could be that the hvac control module has an intermittent problem or the air mix door control for the passenger side is sticking. Check for error codes (DTCs) using a code scanner, but may not show an intermittent mechanical issue. If you can get at the air mix control on the hvac box under the dash on the passenger side, you may be able to check its operation.

May 23, 2017 | 1999 Cadillac DeVille

1 Answer

I have a F40 and F48 code showing. What is this? Thanks.


F40 = Air mix door problem for heat and A/C system.

Sep 23, 2010 | 1991 Cadillac DeVille

1 Answer

Heat not blowing 92 cadillac deville


check you fan, or door controls under dash,
leroy

Dec 13, 2008 | 1992 Cadillac DeVille

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