Upon arrival found thermostat with code 74 on it. Code comes back to EEV thermistor gas side fault reading outside of range. Inspected EEV plug results below 0.029 m ohms red & blue OL k ohms red & blue 0.361 k ohms white & black 364 m ohms white & black Replacement thermistor will have to be ordered and part will need replaced. Will call with update on availability due to Williams closing at 4:30 Homeowner interested in gold or platinum 2 system