Delonghi ct300 air conditioner is blowing warm air not cold

SOURCE: Delonghi Pinguin Air Conditioner

I sat on hold with Delonghi for about 25 minutes before I talked to someone this morning.  Expect a long wait before you get helped.

For this specific problem (unit works, just doesn't blow cold air), the unit MUST be sent to an authorized repair facility.  No repair facilities in Texas.  The closest one to Texas is:

All-Brands Appliance 5008 W. Linebaugh Ave. Suite #8 Tampa, Florida 33624 813-908-2002
Delonghi said they will cover mine under full warranty up to 13-months.  No RMA needed, just a photo copy of the purchase receipt for the unit. Outbound shipping is something not covered by Delonghi, but they will pay for parts, labor, and return shipping.
All-Brands said they don't have any specific requirements for packing, other than making sure the casters on the bottom of the unit are well-protected.  It is common for them to break during shipping.  They recommended, though, that if you have someplace nearby that does professional packing, like a UPS Store, to take it there.  It's not a requirement, just a recommendation.
Along with the unit send a copy (not the original) of your purchase receipt, your name and telephone number, and the address to where the unit will be returned.  Also, include a detailed description of the problem with your unit.
I REALLY hope this information helps someone!  

SOURCE: my cooper line outside on

The evaporator coil that is low pressure and low temperature needs an adequate supply of heat to absorb from air passing over the fins or a thin dusting of frost will begin to form further insulating the coil from the passing air and causing more ice to form. First you have to get rid of all the ice by allowing the coil to thaw you can use a heat gun or hairdryer or lamp to speed the thawing but the fins and copper tubing are thin and easily damaged so don't use tools on the coil to remove ice. After thawed the coil needs to be cleaned with an indoor evaporator cleaner ( I also use a small shopvac and nylon brush) Then be sure that the filter is clean and the blower is functioning properly then if the suction line is still frosting you will have to verify that the size of the outdoor section is not over sized in relation to the evaporator coil and that the system is charged to meet the compressors manufactures specifications.

SOURCE: coleman tsr rooftop airconditioner

NEED A FREON RECHARGE AND MAY POSSIBLY HAVE A FREON LEAK
STEVE'S APPLIANCE
516-300-3249

SOURCE: Air conditioner blowing only warm air

possibly have a capacitor out on the compressor side of the a/c Since the unit works and its only blowing air the compressor isn't kicking in. The capacitor boosts the compressor to activate the compressor. I would have the capacitor to the compressor replaced first before going any further.

Good luck on your repair

Dave

SOURCE: air conditioner only cools sometimes

Your convergence is off. See the owners manual or call tech support to walk you through a convergence.