I have a 2003 Kia Sedona, A/C unit blowing hot air. I tried to recharge with canaster of A/C purchased from auto supply to no avail.

u gut tadu a dye test on the ac--a good mech will inject and spot a color under a lite

i had the same problem back in 2007 0n a 2003 Kia sedona xl found out that there ate copper tubes running from the rad to the rear heater had small pin holes in those tubes'. Had to replace the tubes but if you get it rom Kia it will be pricey. Try a auto parts shop they maybe able to help you. But also check main rad if you see any leaks or coolant on the grond may have to replace rad at same time

If he used a oil with dye in it you can look for small leaks with a black light, look at all the fittings, condensor, compressor case, and dryer for any build up

You will need to recharge your A/C system. You can purchase the kit to recharge it at any local auto parts store.

you will have to get a dye injected into the system or have it checked witha freon probe

Is it that hot in Sedona. I live in Tucson and thats hot. Have your freon recharged. You can buy the refrigerant at Checker or AutoZone. How do you like our Governor. She really made the national news.

it should ony blow hot from the vent on the floor. this is controlled from a button on the dash labled RR HEATER. if the vents are blowing hot from the roof its another problem. let me know if you need more help

Check the metal part of the heater core lines at the firewall if you can get to them and see if one side is noticeable colder than the other. At least one of them should be hot or you have a bad thermostat. If both are hot than your hot/cold actuator inside is having a problem

Our Sedona had a similar problem, Turned out that the pipes to the rear heater had corroded and were leaking, caused some overheating which blew hot air even when the A/C was on.