air return duct
i was quoted a price of $900.00 to install one 14" return air duct, replace the "return box" on the attic unit with a box that can receive both the original 18" duct and the new 14" duct.
price includes labor, material
seems high for installing one return duct
it will only be about 15' from the unit in an open attic
we have a 5 ton unit that is 10 years old and has been running fine with the original 18" return duct.
the unit started "freezing up" 2 days ago with no other symptoms. temp is the normal north texas summer of 95 to 100 degrees.
the problem started all at once.
filter size is 20x25x1 and is changed every 2 months, filter was not dirty.
any thoughts or suggestions???