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I am a newbie and have had an A/C installed about 2 years ago. Its a trane xl14i. I have recently noticed that the air pulsed in the rooms is not cold. The thermostat is functioning properly and switch on/off the unit adequately.
After having the unit running for a while, I would expect the tube (covered with foam) that connect the outside heatpump to the house to be extremely cold. It is not the case at all.
I would appreciate some help on troubleshooting the issue.

Thanks
Eric
 

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The large line in that insulated tube should be cold and sweating at the outdoor unit. It may be low on freon and you should call the installer or a tech. Running low on freon can damage the unit. Part of the repair may be under warranty.
 
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