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You mean the blower motor stops blowing air , the A/C compressor is still engaged ? The temp gauge shouldn't have anything to do with the blower motor .But stranger things have happened on these systems when they are controlled by a electronic module (BCM )
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The ECM sends the temperature data via high speed GMLAN serial data to the body control module (BCM). The BCM then sends the information via low speed GMLAN to the IPC in order to display the engine temperature.
The BCM applies voltage to the blower motor through the HVAC relay. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the blower motor per particular speed request:
• Low speed--4 resistors
• Medium 1 speed--3 resistors
• Medium 2 speed--2 resistors
When the operator requests High speed, the HVAC control assembly applies ground directly to the blower motor through the high blower motor control circuit.
Do you know anything about automotive serial data communications ? GMLAN Is general motors version of C.A.N controller area network .
Do you know anything about diagnosing automotive electronics ? Using a digital volt ohm meter ? Using wiring diagrams to pin point locations in a electrical circuit for testing ? Do you know what a factory componet location diagram is ? It takes more then looking at fuse's an relays , to see if current is flowing in a electrical circuit .
http://www.bbbind.com/free_tsb.html Free wiring diagrams ! Enter vehicle info. Year , make , model and engine size ! Under system click on HVAC , under subsystem HVAC Controls . Then click the search button , then click the first blue link . This is the blower motor control diagram . Do you know how to read a wiring diagram ?
Did you check for voltage and ground at the blower motor connector? You may be way ahead of me? Different speeds are controlled on blower motor ground circuit. In the diagram, the top wire at blower motor is voltage and the bottom wire is ground. The diagram may not be what you wanted? Brown is voltage, orange is ground at blower motor. Maybe you can hit control and plus on your key pad to enlarge diagram.
see the details and fix it. God bless you This is probably a faulty speed sensor see the diagram attached, clean it and tight the connector . 2)test the input voltage motor, if there are voltage the motor need repair. 3)test the output voltage board for input voltage motor, if there are NOT a faulty control board or
lower board. The error codes will differ between makes and models but
could be e1. see the diagrams
1) adjust the speed sensor see the diagram attached. tight the cable, and clean it. 2)test the input voltage motor, if there are the motor need repair. 3)test the output voltage from the motor controller, for input voltage motor if there are NOT the motor controller need replace. God bless you
1( ADJUST THE REED SWITCH, clean it, and plug it very well see the diagram 2( adjust the speed sensor, see the diagram, clean it, and tight very well. see the diagram 3( after adjustment RUN the software calibration for diagnose, troubleshooting and fix it. God bless you
There are probably six wires coming out of your air handler blower motor. There are 2 brown wires which are capacitor wires, one white wire which is neutral, and probably red,black, and blue. Look behind the door of the air handler to see the wiring diagram. They should have the color coded speeds marked on the diagram. There is probably some sort of control board that the blower speed taps plug into. By changing these wires around on these taps you can adjust the speed of the blower motor.