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Overheating

Chevrolet Optra 2009  118000 miles
Good night, I would like to share my case with you. Some weeks ago, after driving around 25 miles at 75 mph, I stopped when passing by a police check and the air compressor turned off. Two minutes later, it started working again. This failure was repeated 4 times in the same week. The fifth, I noticed an engine temperature increase. When checking, I noticed that there was a small leakage in the plastic connetion that leads to the thermostat. A copper junction was installed and the missing refrigerant was added. The temperature sensor never reached 100%, I always stopped at 75%. The failure continues to appear. There is no refrigerant loss, the thermostat has been replaced, the water pump has been checked and it is alright and even a test has been made with a punched thermostat. However, the problem has not been found yet and it has been checked by 10 different mechanics, without exagerating. I would appreciate any comments and suggestions.
CHESTER from United States 9 years ago  
CH
Rank 5
2 reports 
dacey from United States 9 years ago
Hello, probably your thermal expansion valve is damaged. Any air conditioning technician should be able to solve this problem without charging you too much. Good luck.
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Best answer (according to CHESTER)
CHESTER from United States 9 years ago
Thank you for your comment. I would like to share how I solved it. Even though the car always had refrigerant since leaving the agency, the radiator was too dirty. It was cleaned but it was necessary to replace the superior and inferior tanks because they were considerably obstructed. Even more, the refrigerant reservoir was replaced as it was left useless after moving the hoses so much. Luckily, the car started working properly again. Thank you very much.
Reed from other 3 years ago
Is it true when optra is overheated the fuel pump will stop working mi car is 2004 model...thanks for the answer
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