Sebring Convertible V6-2.7L (2009)
Blower Motor: Description and Operation
Operation
OPERATION
The blower motor is used to control the velocity of air moving through the HVAC housing by spinning the blower wheel within the HVAC air inlet
housing at the selected speed.
On the manual temperature control (MTC) heating-A/C system, blower motor speed is controlled by regulating the path to ground through the blower
control switch and the blower motor resistor. With the automatic temperature control (ATC) heating-A/C system, blower motor speed is controlled by an
electronic blower motor power module, which uses a pulse width modulated input from the A/C-heater control and a feedback signal from the blower
motor to regulate the blower motor ground path. On both systems, the blower motor will operate whenever the ignition switch is in RUN and the blower
motor control is in any position except Off. The blower motor receives battery current through the totally integrated power module (TIPM) whenever the
ignition switch is in RUN.
The blower motor can be accessed for service from underneath the instrument panel.
NOTE: The blower motor is supplied with a 12V feed from the TIPM whenever the ignition switch is in RUN. Due to an open circuit
condition within the blower motor control switch the TIPM is UNABLE to detect an OPEN circuit for the blower motor.
The blower motor control system is diagnosed using a scan tool See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures.
The blower motor and blower motor wheel are factory balanced as an assembly and cannot be adjusted or repaired and must be replaced if found
inoperative or damaged.
