Question about 2005 Chevrolet Malibu

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The air conditioner doesnt come on

Speed control 1,2,3 do not work. 4 does not. also now I dont have any power to control the heating and cooling. It is heating all the time.

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The blower motor is bad. replace it

Posted on Jul 03, 2009

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1 Answer

2004 lincoln ls air conditioner blowing hot air on both sides


It can be the following:
1) bad thermostat,
2) worn out fan pump, these have an elec/hyd fan and a bad module that has 4 or 5 hoses connected to it and 2 relays on top that controls the heating and cooling units.

Apr 19, 2017 | Lincoln Cars & Trucks

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2007 Buick Lucerne CXL: Cooled seats not working. LIghts come on, temperature adjusters work but the motors under the seats do not come on.


Air Circulation
When the heated/cool seat switch is pressed to initiate operation of the climate control seat (CCS) system, cabin air is drawn through the heated/cool ventilation module air filter, then directed through passages in the foam of the seat cushion and seat back to the seat's occupant. In order for the CCS system to operate to its optimum performance, it is crucial to have unrestricted air flow through the system. A dirty or restricted air filter, the blockage of an exhaust air duct, a misaligned heated/cool ventilation module, or incorrect foam installation of the seat cushion or seat back will all have negative effects on CCS operation.
Heated/Cool Ventilation Module
Each heated/cool seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by the climate control seat module (CCSM). Each ventilation module contains a thermo-electric device (TED), a temperature sensor, and a blower motor. The TED and temperature sensor are mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air into the seat cushion and seat back, or directed into the cabin as waste air.
A TED is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to a TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. When the polarity of the current flow to the TEDs is switched, the hot and cool sides of the TED reverse.
During the following climate control seat system description and operation, the TEDs, blower motors, and temperature sensors will be referenced independently even though they are all packaged together as a module.
Climate Control Seat (CCS) System
The CCS system consists of two heated/cool ventilation modules and one climate control seat module (CCSM) that controls both the driver and passenger heated/cool seats systems. The CCSM is mounted below the front passenger seat cushion. It receives power from both, battery positive voltage and ignition 3 voltage.
Once a CCS system is activated, cabin air is drawn through the seat blower motors and directed across the fins of each of the thermo-electric device (TED) located under the seat cushion and in the seat back. The air is either heated or cooled as it passes over the TEDs. This conditioned air is then directed through channels in the foam of the seat pad and through small holes in the seat cover to the occupant. Once the system is activated, the CCSM uses a set of algorithms to control the temperature of the selected heating or cooling modes.
Your best bet is to take your vehicle to a qualified repair shop an have it diagnosed .
DTC B19A4: Driver Seat Back Blower Speed Circuit High

DTC B19A8: Driver Seat Back Blower Speed Circuit Short to Ground

DTC B103D: Driver Blower Power Circuit

DTC B272E: Driver Seat Back Blower Circuit Open
DTC B19A3: Driver Seat Cushion Blower Speed Circuit High

DTC B19A7: Driver Seat Cushion Blower Speed Circuit Short to Ground

DTC B2729: Driver Seat Cushion Over Temperature
DTC B19A2: Passenger Seat Back Blower Speed Circuit High

DTC B19A6: Passenger Seat Back Blower Speed Circuit Short to Ground

DTC B111D: Passenger Blower Power Circuit

DTC B272F: Passenger Seat Back Blower Circuit Open
DTC B19A1: Passenger Seat Cushion Blower Speed Circuit High

DTC B19A5: Passenger Seat Cushion Blower Speed Circuit Short to Ground

DTC B272A: Passenger Seat Cushion Over Temperature
Driver and Passenger Heated/Cool Seats Inoperative
  1. Ignition OFF, disconnect the C1 harness connector at the CCSM.
  2. Test for less than 5 ohms between the ground circuit terminal M and ground.
  3. ?‡'
    If greater than the specified range, test the ground circuit for an open/high resistance.

  4. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
  5. ?‡'
    If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

  6. Disconnect the C2 harness connector at the CCSM.
  7. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
  8. ?‡'
    If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

  9. If all circuits test normal, replace the CCSM.


Sorry

Jul 10, 2016 | 2007 Buick Lucerne CXS Sedan

2 Answers

How do you know if your blower resistor is bad?


Unlikely a blower motor resistor problem. If the resistor is faulty. the fan speeds will not work/fail on the lower speeds. High speed will normally always work. If the fan is non operational suspect a fan motor issue.Bad fan motor/switch/wiring to it

Jul 22, 2015 | Cars & Trucks

1 Answer

My dodge the heat is not working


dodge fan heat-cool system uses resistive coils to control fan-speed. the module is located under the windshield. take off wipers, fresh air vent, look for a box with 2 coils in it. 1 thick and 1 thin.

Dec 26, 2013 | 2003 Dodge Caravan

1 Answer

Circuit unit behind the ac controls


sounds like your blower motor has stopped working check for power going to the blower system if you have power the blower is probably bad the concern is the lack of a fuse blowing or a breaker not cycling you may have a harness problem sometimes a low grade short will heat up wires then melt them together causing a multisystem failure even though a fuse or breaker didn't blow check you harness

Aug 09, 2012 | Dodge Avenger Cars & Trucks

1 Answer

Blower fan doesnt work 1 through 3 but on speeds 4 and 5 it does is that the resistor tot he blower fan if it is how do you take it out


There is a voltage control ballast which controls the different speeds. This is usually located in the airflow from the fan to keep it cool, and is about $15. Usually one speed still work if this goes out. High should work. [Look under the dash of passenger side in the air flow ducting, maybe behind the glove box. Look for a connector block with 3-4 wires comming out, held in by 2-3 screws. Dont run it outside the air flow, it may burn out real quick.]
If this is helpful - Please vote

Jul 25, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

Control switch for heater/ac only works on # 5 speed, why doesnt 1 thru 4 work


This is typical of a voltage resistor pack problem, it controls the different speeds of the fan.
I'm not familier with your Tahoe, but this is usually installed right in the air stream of the fan to keep it cool.
Look for a connector block with 3 or four wires, installed under the dash of passenger side, right ito the air tube moulding, very close to the fan.. 2 or 3 screws, should be quite easy to replace it and inexpensive. Just be sure to install the new one all the way before trying to turn on fan. It needs the blowing air to cool or may burn out immediatly.

Mar 26, 2011 | 2001 Chevrolet Tahoe

1 Answer

Blower only works on 4 (top speed)


sounds like you need the blower speed resistor...once you put in the new one it will work just fine.......

Sep 19, 2009 | 2000 Ford Focus

1 Answer

Nissan maxima 1996


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1 Answer

Air Conditioner Problems


Check for a vacuum leak. The vacuum cannister under the evap. case will crack and cause a leak. I just install a new vacuum cannister,check valve and hose going to inside of van.

May 28, 2009 | 2002 Ford E350

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