I want to measure the evaporator temperature on a Goodman horizontal cased coil attached to Goodman GMP80 furnace in an attic and I need some advice on exacted where to check it . (use IR or dial thermometer?). Is this late 1990s model this a fixed orifice or TXV unit ?
BTW, the delta between the return and the suppiy register closest to the unit (about 8 ft duct) is about 12 degrees F (80-68). The unit is located in the attic. Should the delta be higher ?
I also plan to check the superheat and subcooling calculations. Any other advice to add to that mentioned in the reference below -
http://www.udarrell.com/ac-trouble-shooting-superheat-subcooling.html
BTW, the delta between the return and the suppiy register closest to the unit (about 8 ft duct) is about 12 degrees F (80-68). The unit is located in the attic. Should the delta be higher ?
I also plan to check the superheat and subcooling calculations. Any other advice to add to that mentioned in the reference below -
http://www.udarrell.com/ac-trouble-shooting-superheat-subcooling.html