I have had my 2005 Kia Rio since 2014. The A/C was cold for a short amount of time but has since then been difficult. I've had 3 separate diagnostics on it and so far I haven't gotten any answers. Last summer, I went to the dealership for a diagnosis and they said everything was working "fine", that the A/C was "cold", and that they put in a dye and wanted me to come back in a few days to check for a leak with the dye in place. The A/C never felt cold to me, in fact it was about as warm as the outside temperature, but I did not return to the dealership and spent the summer in the heat. Yesterday, I took my car to another shop for an A/C diagnosis and to have belts replaced (but not the timing belt). The shop said the A/C is blowing "cold" and did not find a leak as well but put in some Freon-- it is not cold, it's just not hot. What could be causing the issue that cannot be seen with diagnostics?
My car has 139000 miles.
My car has an automatic transmission.
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