Just bought used portable ac. it blows great cold air then blows warm air for a while then back to cool andcold... is this normal? if not hwo to fix?

See this post on your exact problem http://ricksfreeautorepairadvice.com/car-ac-blows-cold-blows-warm/

http://ricksfreeautorepairadvice.com/car-ac-blows-cold-blows-warm/
Car AC blows cold then blows warm Ricks Free Auto Repair Advice

Sounds like a bad or stuck reversing valve. Typically r.vs. are energized in cooling, verify 24 volts to valve, if yes , bad valve

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Some portable ACs will suck in warm air from outside, making it hard to cool the room. The only fix is toget a machine with a balanced pair of ducts.

A heat pump is an air conditioner that reverses its refrigerant flow. In the cooling mode, the evaporator is cold to the room and its condenser is hot. In the heating mode, a valve reverses the refrigerant flow and makes the evaporator warm and the condenser cold.

I,t sounds like you had a leak, and pulled air into the system. This calls for professional servicing. Whenever there's a leak in a refrigeration system, air and sometimes other noncondensables get pulled into the system. They don't belong there. They cause heat and high pressure in the condenser, and will eventually destroy the compressor. The system needs dehydration and evacuation before charging. That's after all leaks have been repaired.

Unfortunately there can be several reasons for your AC-14000E portable air conditioner not cooling well. As with most portable air conditioners the filter grates on the rear of the unit can be removed for cleaning. When those are removed you may be able to clean some portion of condenser coils. There is also the possibility that your portable AC has a refrigerant leak in the system and will not be able to cool effectively without a repair (which usually costs as much as a new portable AC). Portable AC's are not designed to be recharged and operate on a sealed refrigerant line so even finding someone able to repair it may be a challenge. Your best bet is contacting the company you bought it from and talking through some solutions, they most likely have experience with these units and should be able to help you.

ac is not blowing cold and i have had the freon refilled and leaks fixed any other thing it could be

Hello
Welcome to fixya.
I'm Huuum and happy to assist you,

You said, it is not blowing cool air after you emptied the tank.

Turn the unit off and unplug it for 5 minutes.............
Then back in with the plug and turn it on max cool.
Give it 5 or 10 minutes to get cold, and we will see if this procedure has reset the system.
Then get back to me and let me know it's working!

How old is the unit?


Please remember to leave a rating before you go!
Thank you Huuum

Some units do cool/dehumidify only im afraid why cant you let the unit dump its hot air into the room then it wont heat or cool the room?