June 3rd, 2012 by John Wright
Automotive Air Conditioning is built to remove undesired ?heat ? from inside, dehumidify the cabin atmosphere and supply cool air for the comfort of the occupants.
Every air-conditioning system works by taking the heat from the cabin air to heat and vaporize the refrigerant liquid like Freon. The liquid is pressurised by the compressor and although it takes the heat from the air it burns in the enlargement valve and the ?hot ? gas is circulated thru a series of tubes to diffuse the heat and in the procedure the Freon gets cold.
By now it is clear that the most vital component, in the rather complicated layout verbally listed above, is the compressor which is similar to the heart in your body and the Freon is like blood. Initially cold Freon is passed through metal tubing to the dash area in your vehicle to the ?evaporator zone?.
This where the heat needs to be removed from and has an ?evaporator core ? resembling a miniature radiator with thin tubes and metal fins, the only difference being there is no coolant or anti-freeze and this is cold not like the radiator which is always hot.
A small fan or blower, which is controlled for its speed and volume of air delivery from your cabin, fitted behind the evaporator blows the air thru the evaporator grills and into your cabin. Freon absorbs the heat from the cabin with the help of the ?condenser ? fitted in the front next to the radiator.
Freon circulating back from the cabin carries the heat thru rubber and metal tubes and the condenser has coils of aluminium and Freon is forced through fine slits while the electrical cooling fan mounted in front or behind the condenser removes the heat. The cycle is repeated continuously so the atmosphere in the cabin remains cool.
After having been familiarized with how your automobile air conditioner works and what its major parts are, it?ll be interesting to see what all presumably could go bad and the way to remedy them. Some of the most typical of such issues include:
? Low or total absence of air flow across the condenser- this should be due to issues with the electric cooling fan. Check to confirm if this is turning (in models with fan blades detectable) or if undecided you should call your engineer
? Low Freon level ? this could be doubted if the cooling potency is low i.e, even with the car AC entirely ON there is very little cooling within. That issue could only be attended by a licensed AC technician.
? AC is working in full , but cooling is poor and engine is overheating ?this happens in models where there are no separate fans for condenser and radiator, which shares a common huge fan or engine is overheating due to other Problems and cuts down the condenser efficiency. In all cases reach for the phone and call your garage, before you?ve got more serious problems with your automobile.
? If the air conditioner doesn?t begin at all check and confirm that there is blown fuse or the switch isn?t disconnected while cleaning and so on. Electric connections can be often the offender, which can on occasion be found out with a little experience.
? If your car needs a complete change or replacement of major components like compressor, get it from the OEM and check the refrigerant is the proper one. (R12 is being PHASED OUT)
It should be borne in mind the refrigerant which in older models is R-12, substance renowned for its detrimental impact on the environment due to ?ozone layer depletion?. Additionally, the substance is responsible to cause injury to your skin and eyes if you try and interfere with the automobile aircon system and coincidentally lets it leak. In short automobile air conditioners have little ?user serviceable ? parts or parts and require the help of a qualified and certified engineer.
Whenever low Freon level is suspected or low cooling is felt in spite of the rest allegedly fine, do not refrain from seeking pro help from qualified personnel. It may be opportune to mention here that old models of vehicles using R12 as the refrigerant has only up to 2013 to continue to replenish the banned substance.
No new cars are able to use R12, but has to change to R134A or similar environmentally safe refrigerants as per the Montreal Custom and directives by the EPA. Some vehicle makers have recently started selling retro-fit kits and if or when your auto wishes servicing or repairing of AC, check if you are still using R12 or any other illegal substance and change over to approved refrigerants A.S.A.P.
John Wright is recognized as a globally published writer, voicing his thoughts and opinions on a distinctive selection of subjects, covering anything from click here to politics, religion to for more info. His insightful work is released on websites around the globe.
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