Auto Air Conditioner Repair - No cool air, noisy AC, etc

General Automotive Repair

Auto Air conditioner systems are designed to allow the driver and or passengers to feel more comfortable during uncomfortably warm humid or hot trips in a vehicle. Cars in hot climates often are fitted with air conditioning. There has been much debate and discussion on what the usage of an air conditioner does to the fuel efficiency of a automobile. Factors such as wind resistance aerodynamics and engine power and weight have to be factored into finding the true variance between using the air conditioning system and not using it when figuring out difference in actual gas mileage. Other factors on the impact on the engine and an overall engine heat increase can have an impact on the cooling system of the vehicle.

The Packard Motor Car Company was the first auto manufacturer to build air conditioners into its cars, beginning in 1939.[16] These AC systems were originally optional, and could be installed for an extra $274 (about $4,050 in 2007 dollars),[17] though they took up the entire trunk space and were not very efficient. General Motors introduced a more efficient air conditioner beginning with its 1954 Pontiac V8 models, but automobile air conditioners
would not become truly commonplace until the 1970s and 1980s. Wikipedia:Air Conditioning

The auto air conditioner repair information lists common vehicle symptoms with possible solutions and is not for any particular automotive vehicle make and model. For repair info specifically for your auto make and model please view the main directory. It is highly recommended that any auto air conditioning service work be completed by a reputable auto shop.

Auto Air Conditioner Compressor Not Working

• Compressor clutch circuit open.
• Compressor clutch coil inoperative.
• Poor clutch ground connection.
• Fan belts loose.
• Thermostatic switch inoperative.
• Thermostatic switch not adjusted.
• Ambient temperature switch open.
• Superheat fuse blown.

Noise or Vibration from AC system

• Missing or loose mounting bolts.
• Bad idler pulley bearings.
• Fan belts not tightened correctly.
• Compressor clutch contacting body.
• Excessive system pressure.
• Compressor oil level low.
• Damaged clutch bearings.
• Damaged reed valves.
• Damaged compressor.

Very low or No Cooling but AC Compressor Working ok

• Expansion valve inoperative.
• Heater control valve stuck open.
• Low system pressure.
• Blocked condenser fins.
• Blocked evaporator fins.
• Vacuum system leak.
• Vacuum motors inoperative.
• Control cables improperly adjusted.
• Restricted air inlet.
• Mode doors binding.
• Blower motor inoperative.
• Temperature above system capacity.

General Automotive Repair

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