symptoms of a bad ac pressure switch

Symptoms Of A Bad AC Pressure Switch

The AC pressure switch in your car monitors the refrigerant pressure in the air conditioning system and controls the compressor to adjust the pressure. Its main purpose is to protect the compressor. But what happens when this component fails and how can you tell? Well, let’s find out!


Symptoms Of A Bad AC Pressure Switch

symptoms of a bad ac pressure switch

Compressor Fluctuates

A car’s air conditioning system operates automatically and shuts off when it reaches a particular pressure. But if an a/c pressure switch is broken, you can notice that it fluctuates or turns on and off frequently. When the automobile is idle, you may quickly detect this by looking at the RPM and seeing how frequently it changes. It is one of the typical AC pressure switch symptoms that you can initially identify.

Air Conditioning Stops Working

What could be worse than sporadic air conditioning? What happens if it never works again? The refrigerant pressure switch sensor may be broken if your air conditioner doesn’t turn on. The air conditioning system is made up of numerous parts, thus your issue could be completely different.

Related Article: Symptoms Of a Bad AC Compressor

Warm Air Blowing

You expect cool air from the vents when you turn on the air conditioner. However, warm air can be all you get if the AC pressure switch is broken. Low refrigerant levels, though, are also a contributing factor to this issue and should be periodically monitored.

Strange Noises From Air Conditioning System

You’ll notice some strange vibrations if the compressor is switching on and off. The clicking sound will be similar to that made when the compressor regularly turns on, but there won’t be any airflow. When you flip the switch, the compressor goes on and off; look out for the distinct clicking sounds that indicate this.


The AC pressure switch plays a crucial role in the functionality of your air conditioning unit. If it malfunctions, it could lead to costly repair expenses, making it essential to address any issues promptly.


2 responses to “Symptoms Of A Bad AC Pressure Switch”

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