Dear Repair Technician, The problem is complicated, it is not just (1) thermostat not matching its own thermometer and not just (2)its thermometer not matching any of my own thermometer. Main problem is (3) UNDER-SENSITIVITY OF THERMOSTAT What happens many times (not always but often) is once you move the thermostat just barely enough to turn A/C on, it STAYS on until house is too matter how tiny the amount you change it to turn it off, if oten stays off until house is too hot, etc.

So never mind (1) and (2) (which while not fun, I can live with)..the main problem is (3) which is the thermostat itself..which seems to need replacing. Anyway thank you for fixing this..    :-)