Question about Heating & Cooling
If the return is pulling the proper amount of air in, and the supply side is not producing the proper amount of air, then the evaporator coil is clogged.
It could be from Ice due to freezing up, or a dirty coil, or both.
Examine the inlet side of the coil to see it's condition. Defrost/clean as needed. Then turn the unit back on and check the temperature drop. (the temp of the air going into the coil, vs the air coming out of the coil.)
It should be between 15 to 20 degreesF.
Also check the refridgerant charge. (this requires a CFC certification in the US.)
Dirty coils and low refridgerant will cause the coils to freeze up.
If the unit is low on refridgerant, it will need to be recharged.
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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