NEXON

HVAC 16 ii) BLOWER RESISTER The speed of the blower can be controlled by em- ploying either a Blower resister. The blower resister is used in models with manual HVAC. A blower resister used is for a four-speed control of blower speed. This is achieved by having a combina- tion of three different resistances. The blower resister is placed in the intake air flow to allow it to dissipate heat freely. It is located on the lower side of the HVAC unit to the right of the blower. CIRCUIT DIAGRAM PIN OUT A Medium Low Resistance (ML) B Medium High Resistance (MH) C High Speed (directly engaged) D Low speed resistance INSPECTION Measure the current at the harness side connecter at 4 speeds by rotating the blower switch. The current measurement should as per the table below. FAN SPEED CURRENT IN AMPS 1 st Speed 3.5 – 5.9 2 nd Speed 6 – 8.5 3 rd Speed 10.5 – 13.5 4 th Speed 14 – 25.0 The resistance can also be checked. For resistance values refer circuit diagram of blower resistor.