I am stumped Read this..!

rsmith46

Try using this formula for fixed metering systems to find the target superheat.
WB x 3 - 80 - odt divided by 2
So 64 x 3 = 192 - 80 = 112 - 93 = 19 / 2 = 9.5deg superheat

rdjr1964

How old is the system? I found a while back that the coating that was used on the condenser coil (which worked great for a while) deteriorated and caused a extremely hot liquid line which causes a lower super heat ,flooding the evap coil and thus not evaporating and absorbing the heat and removing humidity therefore the indoor comfort was unsatisfactory. They have since solved this problem.

acefurnacefixer

sounds like a customer that we have up north in the summer.....they are snow birds in the winter......

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cortez

Many older customers will suddenly hear and realize that their unit is running almost non stop at 68 degrees.

I ask if their electric bill is considerably higher, and they say no it is almost always the same in summer usage. I tell them that it is probably no concern, but a service call will be $$$ (my current rate).

Often this is only a matter of noticing continuous (or nearly so) running of their AC.

In Chicago area the summers can be brutally humid and many installers put in units that run 80 to 90 percent of the time for uniformity of cooling (this was some years ago when the "common wisdom" dictated this strategy).

Often this could could be put to rest with with an over the phone call for the customer to report any future spike in electric cost.

Residentialtech

Have you checked ductwork for any leaks and attic insulation?