Air Conditioning Service/Repair
Air Conditioning Service/Repair
What Our ASE Certified Technicians Do
Cooling system maintenance is important for the longevity of the car for many reasons. As the coolant in the car gets older, the freeze point lowers with age. With severe Minnesota weather, it's important not to loose the lower freeze a point. As we all know, water expands when it freezes, but when it expands in the radiator or engine block, this may create a crack or a leak in the cooling system. In the summer time, we need the ethlene glycol, or radiator coolant, to raise the boiling point of the colling system. This ensures that when we turn on our AC in rush hour traffic, our automotive cooling system can eliminate the heat. Performing cooling system maintenance restores or replaces the rust inhibitors and brings the PH to proper levels. Without the proper PH, rust and corrosion can occur internally. There is many more reasons to perform cooling system maintenance and Iam not about to bore you with the nitty gritty. Listing the most important reasons should be good enough.
The following components are inspected. Recommendations are made per the Motorist Assurance Program Uniform Inspection Guidelines:
Heating and Air Conditioning Systems
- Interior controls and blower
- Radiator coolant level, hoses, pressure cap and thermostat
- The A/C compressor belt for condition and tension
- Leaks or other damage
- Component condition, leaks or damage
- Blockage of the Front Radiator or Reduced Air Flow
Heating and Air Conditioning Tests
- Pressure test engine cooling system
- A/C system pressures are measured and compared to manufacturer's specifications
- A/C system is leak tested
- Both the heater and A/C are performance tested by checking the outlet air temperature at the discharge vents
- Freeze point of Engine Coolant
- Vent Discharge Temperature
Auto Heating and Air Conditioning
Your car's engine is the power source for both heating and air conditioning systems. The systems also share other components, as the following diagram shows. Here's what happens when you flip on the heat or the air conditioner:
Heat is a byproduct of the engine's combustion process. The heat is absorbed by the coolant in your car's radiator. The coolant is then circulated through the heater core before returning to the radiator. The heating system also includes a series of air ducts, a blower motor and fan, and temperature and duct controls, which select the desired temperature and direct the flow of warm air.
Air Conditioning System
This system shares air ducts, controls and a blower with the heater, but has its own refrigerant system. The air conditioning system is comprised of the following components:
This is a pump that pressurizes and circulates the refrigerant through the system.
As the refrigerant flows through the condenser, it gives up heat and converts from gas to liquid.
Receiver Dryer or Accumulator
This is where clean, dry refrigerant is stored as it circulates through the system.
Orifice Tube or Expansion Valve
This is a metering device that controls the flow of refrigerant through the system.
Refrigerant enters the evaporator core as a liquid. Heat from the air converts the liquid refrigerant back into a gas, which cools the air before it enters you car.
Automatic Ac or HVAC have temperature sensors, blend door motors, and pressure sensors. May networked or in communication with the PCM or other modules.