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Feel of the large copper line at outdoor unit and tell me if it is beer can cold and sweating? We will go from here.
OK great. if that line is cold, the outdoor unit is fine.Lets look at a couple of things.
1.Check indoor filter and make sure it is clean.
2.Ceck temperature of air at filter and air at register using a thermometer. We should have 17 to 20 degree cooler at register.
Let me know about these and we will go from here.
Usually there is one large filter and grille at the indoor unit.Do you a have one large grill close to the unit? Pics might help me