What does a AC high pressure switch do?
A high pressure switch (HPS) and a low pressure switch (LPS) are protective devices for the compressor and refrigeration circuit. The high pressure switch monitors the system for an inoperative outdoor motor, and/or a dirty/restricted condenser (outdoor) coil.
How to replace the a / C pressure switch on your Mercedes?
This will allow you to access the shield that protects the condenser and the A/C pressure switch. Fold the second splash shield out of the way to gain access to the A/C pressure switch.
Where are the low and high AC pressure switches located?
The low-pressure side switch is found before the AC compressor, while the high-pressure switch comes after the compressor. Most AC pressure switches are found within the engine compartment, but some manufacturers put them elsewhere. A look in your service manual will show you the appropriate location for your model. AC Pressure Switch Function
How to remove a pressure switch from an AC unit?
Part 2 of 3: Remove the A/C pressure switch 1 Disconnect the negative battery cable. Disconnect the negative battery cable with a wrench of ratchet. Then set it aside. 2 Remove the switch electrical connector. 3 Remove the switch. Loose the switch with a socket or wrench, then unscrew it.
What happens when you replace a pressure switch?
The most common symptom of a failed A/C pressure switch is an inoperative compressor and lack of A/C. In order to safely and efficiently replace your A/C pressure switch you need a couple of basic tools:
How do you remove a pressure switch on a Mercedes?
Fold the second splash shield out of the way to gain access to the A/C pressure switch. This step is straight forward and just requires you to be careful. A/C lines are typically constructed of aluminum and can break easily, so you want to hold the line while using your 27mm box wrench to remove the sensor.
How to recharge air conditioner ML320 W163 1998?
Open the hood of your ML320 W163 and locate the low-pressure AC service port and remove the cap. Attach the refrigerant gauge to the service port. You will need to press and hold the quick-release at the end of the hose, insert it on the AC charging port then release it. Read the pressure in your air conditioner system.
How can I replace my a / C pressure switch?
In order to safely and efficiently replace your A/C pressure switch you need a couple of basic tools: Free repair manuals – Autozone provides free online repair manuals for certain makes and models Step 1: Locate the A/C pressure switch. The pressure switch can be mounted to A/C pressure line, compressor or accumulator/drier.
Where is the pressure switch on an AC unit?
Step 1: Locate the A/C pressure switch. The pressure switch can be mounted to A/C pressure line, compressor or accumulator/drier. Step 1: Disconnect the negative battery cable.