I purchased a Daiken AC/heater from Goodman manfacturing, unit DP14GM*******, serial number *******564. The salesman assured me Daiken products were of higher quality than say, TRAM units and it cost more. The unit is now 2 and a half years old and the high pressure switch malfunctioned was defective according to Precision Air who sold and installed the unit. The part was $178.00 and was covered, but I must pay $1600. For labor to replace it by Precision Air. Why the customer has to pay for the labor for a part that was defective is amazing. Beware of this sales pitch on covered parts.