Thermostat and method for controlling an hvac system with remote temperature sensor and onboard temperature sensor

A building automation system (BAS) system, the system comprising:

• a thermostat including an onboard temperature sensor;
• a remote temperature sensor in operable communication with the thermostat;
• and
• a controller in operable communication with each of the onboard sensor and the remote sensor and configured to execute a control algorithm that calculates a temperature difference between a temperature detected by the onboard temperature sensor and a temperature detected by the remote temperature sensor, such that when the remote temperature sensor fails, the controller uses the calculated temperature difference to calibrate the onboard temperature sensor.

A heating, ventilation and air condition (HVAC) system, the system comprising:

• a thermostat including an onboard temperature sensor;
• a remote temperature sensor in operable communication with the thermostat;
• and
• a controller in operable communication with each of the onboard sensor and the remote sensor and configured to execute a control algorithm that calculates an error constant based on temperatures detected by the onboard temperature sensor and the remote temperature sensor over a time period, such that when the remote temperature sensor fails, the controller uses the calculated error constant to calibrate the onboard temperature sensor.