What kind of thermostat is it? I'm not familiar with the Greyhawk stats. If I'm assuming it's a digital stat, is it programmable?
2015 Jayco 24FBS Elite Jay Flight
2013 Chevrolet Silverado 2500HD 4X4 6.0L 3.73 Axle
HD Trailering Package with Integrated Brake Controller
Equal-i-zer Hitch 10k/1000