How Your Engine Cooling System and Air Conditioner Affect One Another

How Your Engine Cooling System and Air Conditioner  Affect One Another

Hot weather is upon us. In this article we’ll explain how your engine’s cooling system and your air conditioning affect one another.

Certain components are connected to both systems. If either system is not operating at its full efficiency, the other could be affected.

An example of this is the cooling fans–both the engine cooling fan and the air conditioning auxiliary fan. These fans are necessary to move a sufficient amount of air through both the radiator and the air conditioning condenser. If one or both fans are not operating correctly, sufficient air flow is not achieved. This is not to be confused with the air flow from your dash vents. The air conditioning condenser resides immediately in front of your engine’s radiator. If either the condenser or the radiator is operating at higher than normal temperature, there is excessive heat transfer to the other component.

Another example would be the engine temperature sensor and the auxiliary fan speed resistor. These two components control fan speeds for both systems. If they are not switching the fans on at the proper time, engine operating temperature and air conditioning output temperature could be too high. In heavy traffic conditions, it is imperative that these work properly to maintain normal engine temperature and proper air conditioning operations.

At BMI, we test for proper operation of both cooling systems when doing service or repairs to either system. By doing this we can better ensure a proper repair. Atlanta summers are warm enough, without the additional headache of no air conditioning or an overheated vehicle. If you are experiencing problems with either system, please let us know immediately so that we can check it out as soon as possible. As always, repairing problems before they get worse is the best way to keep costs to a minimum and prevent further damage.