Question about 2005 Hyundai Elantra

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AC not cooling

I have a 2005 Hyundai Elantra, and I have been having an issue with the A/C not always being cold. When I am driving on the freeway and they engine is running at higher RPM's the A/C work great and is cold. But when I am at stop signs or get into traffic on the freeway and I slow down the air from the A/C unit seems to be outside air temp or hotter. If anyone knows anything that would help that would be great. Thanks

Posted by Anonymous on

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  • Hyundai Master
  • 2,042 Answers

I would suggest your Freon is getting low in your air conditioner. As the motor revs up it circulates but won't when the engine slows down. Get a mechanic to put a tester on it and should not cost a lot of money if that is all the trouble there is..

Posted on Jul 19, 2017

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  • Hyundai Master
  • 12,962 Answers

Need some more refrigerant.

Posted on Jul 19, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

ghost4548
  • 776 Answers

SOURCE: A/C hot and cold air....

Technical Information: When the engine overheats (goes above 220 to 230 degrees), the ECM (Engine Contro Module) will disable the AC (won't let the compressor engage). This is a safety feature of the EMS (Engine Management System) to reduce potential damage to the engine from an overheat condition. Check your coolant level in the radiator & reseviore -- Low coolant level can produce the symptom you describe -- if low, top them off. Inspect your radiator hoses/cooling system for any signs of leakage (crusty deposits of dried coolant). Wherever you find this, that's where it's leaking. If you don't find any signs of leakage, replace the thermostat (& gasket if required (as a precaution) anyway. When the engine overheats, both cooling fans should come ON HIGH! If they aren't/don't, something's wrong and you need to find the cause. Every two to three years the cooling system should be flushed and inspected to ensure proper operation/condition and system protection. Overheating can seriously damage the engine. $$$$. An ounce of prevention is worth a pound of cure.

Posted on Jun 07, 2009

  • 14 Answers

SOURCE: 2000 hyundai accent hesitates when

inlet manifold either loose or gasket blown

Posted on Aug 20, 2009

buckway2222
  • 6 Answers

SOURCE: Slow pick-up, high rpm

Do a full Service air filter oil transmission oil brake fluid radiator the 9 yards this should help some if not then you should take it to a mechanic to have your transmission tested or you can use lucas transmission stop slip

Posted on Aug 23, 2009

  • 10 Answers

SOURCE: 2000 Hyundai Elantra, Heater Problem.

check the fuses

Posted on Oct 06, 2009

  • 1 Answer

SOURCE: 2002 Hyundai Elantra 100k miles - 2.0l - running rough

When I had this same problem...it was the Catalytic Converter...cost about 200 to get it fixed at the Hyundai Dearlership :)

Posted on Apr 01, 2010

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