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Test
Guide

How To Test Your Failing Mercedes Benz AC Pressure Sensor

Post by: AfricaBoyz Online Created Date: 2022-08-10 11:23:32 0 Comments
How To Test Your Failing Mercedes Benz AC Pressure Sensor

Over the years, the Mercedes Benz brand has revolutionized our motor industry-  meeting the standards of new technological design, yet providing an uncompromising class. The mean powerhouse brand accommodates each of its driver’s expertise by ensuring nothing less than the best. Although, with great power comes great responsibility.

In this article we will focus on one of the brand’s main comfort features- understanding the air conditioning pressure function, outlining the signs that indicate failure, and how to perform testing.

Understanding The Function Of An AC Pressure Sensor: Why Are AC Sensors Important In General?  

If you are currently still unfamiliar with your Mercedes Benz pressure sensor, you can easily locate this part by simply referring to your air conditioning system. The AC switch of your vehicle acts as an indicator that is responsible for the overall temperature to ensure minimum heating/cooling damage. In other words, the AC system of your vehicle maintains the appropriate temperature, while avoiding unnecessary repairs and excessive wear and tear. However, the actual AC pressure sensor is used to detect the exact temperature, to notify both the driver and the necessary components.

What Are The Common Signs/Symptoms That Indicate A Bad AC Pressure Sensor?

If you are currently suspecting that your Mercedes Benz vehicle has a bad AC pressure sensor, then read down below to learn more about the signs that may present themselves:

  1. Indecisive AC Functionality.

Upon noticing poor air conditioning distribution or perhaps functionality is performed in the opposite manner- this should be the first AC fault indicator to drivers. Each component of Mercedes Benz vehicles has specific required functions, meaning that in ensuring maximum safety intermittent failure should not exist.

  1. Unable To Produce Enough Cool Air.

In spite of the fact that ACs are designed to produce two temperatures of air as a mechanical creation, the cooler air somehow seems more adequate in overall functionality. Cool air from your Mercedes Benz AC is essential, as cooling the components within the engine compartment is a must. However, failure of doing so- is indicated as a consequence of a failed refrigerant pressure switch sensor. 

  1. AC System Producing Noises. 

Should you find your Mercedes Benz air conditioning system producing unfamiliar noises, this may simply be a result of components rattling against each other within the engine compartment. Alternatively, a noisy AC system could indicate a poor pressure switch. It is highly advisable to diagnose the fault in order to perform the necessary repairs. 

How To Test Your Mercedes Benz Pressure Switch? 

It's no secret that owning a Mercedes Benz is usually associated with the “elite’’ by many, however even a Benz driver deserves the privilege of saving a few hundred, every now and then. Down below is a simple tutorial on how to perform testing on your vehicle’s air conditioning pressure switch:

What Do You Need To Test A Pressure Sensor/Switch? 

  • OBD II SCANNER.

STEP 1: Ensure that your vehicle’s engine is switched on while turning on the air conditioning system. However, before activating the AC, it is important to have the door of your Mercedes Benz wide open- this is done to monitor regular air conditioning intervals. Irregular air conditioning intervals indicate a faulty pressure switch/sensor. 

STEP 2: Start by connecting a low-pressure gauge of a refrigerant kit to the correct fitting -this can be found between your vehicle’s accumulator and compressor. Ensure that the fitting being used is identifiable by a ‘’L’’ marking. The appropriate pressure reading should display at 56 PSI or higher. Although, if your vehicle’s pressure reads as above ( 56 PSI and above ), then the issue may be with the sensor. 

STEP 3: Locate your vehicle’s OBD II port which can be found around the steering (refer to your vehicle’s owner manual). You can now start attaching the scanner to the ignition switch- make note of the test reading.

STEP 4: The second part of the electrical testing requires the multimeter probes in connection with the electrical harness ends. This is done while the engine of your vehicle is running. An appropriate reading between 4.0 to 5.0V indicates a strong enough connection.

TIP: An incorrect OBD II reading can result in an incorrect diagnosis, therefore choose to retest should you have any doubts. Avoid unnecessary repair costs and additional component testing with an accurate diagnosis.  

 

Looking To Purchase An Affordable Mercedes Benz Pressure Sensor/Switch?

Mercedes Benz parts/spares are typically categorized as one of the pricier brands, however in order to ensure value for money- visit AfricaBoyz Online. Browse through a range of Mercedes Benz parts and accessories that are available for delivery at your doorstep nationwide. Hurry while stock lasts to avoid disappointment!   

You can also read our Article on Car Aircon Sensor 


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