Hyundai Santa Fe (TM): Air conditioning System / A/C Pressure Transducer. Description and operation
The A/C Pressure Transducer (APT) converts the pressure value of high pressure
line into voltage value after measuring it. By converted voltage value, engine
ECU controls the cooling fan by operating it high speed or low speed. Engine
ECU stops the operation of the compressor when the temperature of refrigerant
line is very high or very low irregularly to optimize air conditioning system.

Replacement
1.
Using a Lwrench, remove the cap (A) on the bottom of the receiver-drier.
2.
Inspection
•
Before measuring the pressure of the refriferant line, check
whether the refrigerant amount is charged in accordance with
the specified charging amount.
Other information:
Blower Unit. Components and components location
Components Location
1. Blower unit
assembly
Components
1. Blower unit
assembly
2. Inlet case [LH]
3. Inlet seal
4.