Question about 2002 Toyota Prius

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Hello, 2002 toyota prius I have had freon added numerous times and the service man says he does not detect a leak in the AC. It only works for a little while.. He thinks it needs a part under the dash evaporitol (sp?) and says the labor would cost a thousand dollars. The car has about 150000 miles. He says I should sell the car. What do you advise. Thanks, Mary

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Yours does seem to be a major undertaking to change the evaporator. I would let the dealer check it out and get an estimate.

Posted on Sep 28, 2010

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Air conditioning goes on and off


One of the most common reasons for then the Ac compressor to shut off/down is a low freon level. Does it blow cold air while it is in operation? If the freon level is ok, you could also have a cycling switch failure. It would be uncommon for the compressor to operarte normally for a while and then not work properly if the freon level is adequate

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My air conditioner works but does not cool . i have added freon the last two years and fixed the problem ,did the same thing this year but did not help .


When self adding freon after it leaks out you get air trapped in the system. After adding freon a couple of times the air expands not leaving room for the needed freon. To continue adding freon with air tapped will knock the compressor out pretty quickly, there's not enough room for both & the air is keeping the freon from being able to cool properly give the false indication of being low on freon. The freon you are adding has the dye added to assist in finding the leak since freon does not evaporate nor dissipate it its being leaked out. A black light will assist locating the leak. The best thing is to have the unit checked & serviced by a mechanic...he'll charge about $ 150.00 to check for leaks, remove the old freon...his machine will tell him how much air its trapped in the system by how little freon is removed. For the service fee he will replace valves & gaskets, where needed, correcting most leaks. After sucking the system down & recharging the problem should be corrected.

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My question to you would be are you adding "coolant" to your engine (anti freeze or water) or are you adding freon to your A/C (tip off was the 'three cans').

If you are adding engine coolant, - that is a lot, 'three cans' - and your engine is still over heating, you should get your system evaluated by a pro.

Working on automotive AC is dangerous for the amateur. For starters, amateurs (like me) usually don't have the equipment required to properly evaluate the status of the charge in a automotive AC system. Over charging a charged system is dangerous to you and the equipment just as is operating a undercharged system. Normally, systems are able to protect themselves from operating under charged. Normally, the reverse is not true. Fortunately, we can only 'force' in so much freon.

You have done what you can at this point. It still doesn't work. It is time to go to a professional. It would appear there is a leak somewhere, a leak that you cannot detect, nor repair. Three cans of freon went some where! Your professional AC service man or woman has the equipment to detect leaks, evacuate the system in an environmentally safe manner, repair the leak, if any, effect any other repair that may be required, inject the proper amount of 'sealer' and AC lubricating oil, change the 'drier' and recharge your system to factory specification. At the end of this service, your AC will be in tip-top condition and probably remain there for years. Best of all, you will not accidently injure yourself or your equiment using this process.

That is my suggestion my friend. I hope you find this information useful. Thank you for your interest in FixYa.com

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Air condtioner has a bad smell causing headache


Whether as a gaseous or liquid coolant, Freon aids in refrigeration, air conditioning and maintaining aerosol contents under pressure. Not only can this toxic chemical expose the earth to excessive ultraviolet rays, but the substance can also sicken those who inhale it in an enclosed atmosphere.

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Cardiac arrhythmia can signify the presence of leaking Freon. A person without a history of irregular heartbeats might suddenly detect heart palpitations and faulty blood circulation upon exposure to a Freon leak. The blood circulation problems may also lead to numbness in the limbs.

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    Hello. Welcome to FixYa.

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    GIven the choice of a Prius, versus the other hybrids on the market, the Prius cannot be beat.

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