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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8263
Experience:  Furnace, A/C and heat pump specialist.
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How can I determine the accuracy of my AC thermostat E78-144

Customer Question

How can I determine the accuracy of my white Rogers AC thermostat E78-144 non-prgmAnd how to adjust thermostat internally
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Did you not see my previous answer.As for checking accuracy you will need a good digital thermometer to place right beside thermostat to see if it is out of calibration. If so, you can adjust the temperature displayed by pressing the UP and DOWN arrows at same time for 2 seconds with system switch in OFF position.Then press up or down to set as desired.

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