If your vehicle is shaking when the auto A/C is turned on, this is not normal and should be investigated. There are several reasons why this phenomenon occurs, and getting to the bottom of it will resolve the issue before it worsens. First, it is essential to understand the critical engine components and how they function with the A/C system.

The Role Of The Compressor

The compressor is best thought of as a miniature engine, which puts a great deal of stress on the main engine. As such, whenever the vehicle is turned on, several things are triggered, like the control motor air, so the compressor, although idle, can be elevated through the compensation of additional drag. However, if you notice the car shaking, it means that this process could have become disrupted and therefore inaccurate.

Excessive drag often results from vibrating while idle and is a symptom of engine stalling. In a vehicle that uses power steering, too much drag while the A/C is running could lead to more engine stalling and more significant shaking, and the issue might also be caused by motor mounts that are broken.

Elevated Pressure

The A/C compressor creates significant engine strain, and should this pressure reach a level higher than 400 PSI; the result could be vehicular vibrations. Should the pressure continue rising, multiple engine components will wear out prematurely. Elevated pressure might also be the result of the cooling fan or blockage within the air conditioning. Unless you’re familiar with your A/C and how to perform maintenance on it, it is best to take it to a technician.

Worn Out Transmission Mount Or Engine

The car mounts undergo a lot of strain whenever the air conditioning is activated. These mounts are important since they hold the transmission in place (along with the engine), designed to maintain the correct suspension angle. The mounts are also responsible for organizing hoses and wiring, keeping them away from noise or vibrations in the environment. Therefore, any problem with the mounts will cause vibrations and shaking. If the mount breaks completely, the shaking may be accompanied by noise, particularly if the A/C compressor kit produces more engine pressure. Therefore, if you notice the vehicle shaking, one of the first things you should inspect are the mounts.

Vehicular vibrations or shaking is annoying to drivers, since most of them realize that it signifies some problem with the vehicle that money, time and effort will require to resolve. Many drivers will make the mistake of thinking the issue will resolve itself, or they can put off until a more convenient time.

Don’t make this mistake, give us a call at Callahan Automotive, so we can get your vehicle taken care of and back on the road without shaking!