On very hot days try to park in the shade or leave a window open. Your car will cool down much quicker if the interior doesn’t become super-heated. Actually, the highest temperature to which most people are ever subjected to is the temperature inside a car that has been parked in the sun on 32C day inside temperature can reach 60C.
If the interior of a parked car does become superheated, turn unit on and drive a block or two with windows open. This removes overheated air and permits quicker cool down.
A car with its heater off naturally cools better than the same car with its heater on. Don’t laugh at this one – many heaters still heat even when the controls and fan are turned off. Check it.
Characteristics of your car will affect the cooling performance, for example: a light coloured car cools better than a dark coloured car. A car with tinted glass cools better than one with plain glass. Facts to consider when buying a new car.
Tinted windows help with the cooling of your car.
Variable factors such as your speed, number of passengers and humidity will affect the rate of which your unit cools the car.
The engine temperature of an air conditioned car will run a little hotter than without air conditioning. If loss of engine coolant occurs, have this checked. Several things can be checked to help alleviate the condition. (see periodic maintenance guide).
Turn the unit on for a few minutes each week during cool weather to lubricate the compressor shaft seal.
Don’t worry about water draining out under the middle of your car. It comes from the condensation drain hoses and has been removed from the air, for your added comfort, by the dehumidifying actions of the evaporator coil.
Most drivers find to their delight that the absence of buffeting wind and air noise is just as important for a relaxing and enjoyable trip as proper temperature. Consider using your air conditioning on trips even in temperatures when you would be reasonably comfortable without it.
Under certain atmospheric conditions, water may condense onto the underside evaporator case. You can minimise the possibility of this occurring by ensuring that there are not outside air leaks. Check particularly all points of entry from the engine bay into the cabin, the fresh air vents and door seals.