hi guys , I installed recently a SENTEMP 5031ES in order to swich my HVAC automatically on and off . To my big surprise , it reads a T which is higher than the real on by 6 Celcius . Although I can still do my job , it bothers me to take a false reading from an rather expensive thermometer . Do I have to do something to compesate the error and get the real value on my screen ? Thanks a lot