Applies to:

Calibrating The Standard Single Stage Thermostat

Henny Penny does not recommend that a field calibration be performed on the thermostats. The reasons for this are as follows:

The thermostat is calibrated in a controlled environment from the factory. The thermostat manufacturers do not recommend any adjustments to the thermostat in the field, as this will affect the factory calibration.
The difference between a hand-held thermometer and an installed thermostat can be quite large due to oil temperature variation.
The adjustment of a thermostat is not precise, since the dial reads only in 25°F increments. The accuracy of a thermostat needs to be less than 5°F.

If a thermostat is not reading accurately and suspected to be faulty, Henny Penny suggests that the thermostat be replaced. If you have any questions, please do not hesitate to call the Technical Services Department.