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Home >> Porsche >> 2005 >> Boxster (987) F6-2.7L >> Repair and Diagnosis >> Heating and Air Conditioning >> Description and Operation >> Pressure Sensor
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Pressure Sensor



Pressure Sensor

The pressure sensor is an essential instrument in assessing the air conditioning system. It detects the current pressure in the system and supplies a PWM signal (Pulse Width Modulation) to the a/c control unit. The a/c control unit relays this signal to the CAN bus for further use.

This PWM signal is employed for the purposes of:
- Low-pressure shut-down (p < 29 psi/2 bar)
- High-pressure shut-down (p > 406 psi/28 bar)
- Condenser cooling (see also section "Condenser fan")

The following components serve as actuators:
- Drive motor for temperature mix flap
- Drive motor for central distributor flap
- Drive motor for defrost/footwell distributor flap
- Drive motor for fresh air/recirc. air distributor flap
- PWM - fan motor voltage

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