just monitor low airflow reading 68 for diagnostics data logging or other reasons if however primary microprocessor 38 determines that high airflow temperature reading 66 is abnormal or beyond a predetermined valid range of values primary microprocessor 38 will switch over to controlling compressor 40 and blower 22 in response to low airflow temperature sensor 54 instead in the wireless configuration of fig3 low airflow temperature sensor 54 supplementary microprocessor 52 user input device 62 and output device 60 are removed from within controls chamber 36 and installed in the room at a remote location within a wall mountable thermostat housing 70 which is spaced apart from housing 16 a cover plate 72 can be used to cover the void left in controls chamber 36 to communicate the desired setpoint temperature low airflow temperature reading 68 and perhaps other information between microprocessors 38 and 52 two transceivers 58 and 58 u2032 couple the two microprocessors 38 and 52 in wireless communication with each other via a wireless communication link 74 since wireless configuration of fig3 places the low airflow temperature sensor in a more desirable location low airflow temperature sensor 54 is the preferred sensor for controlling compressor 40 and blower 22 in the wireless configuration thus if microprocessor 38 or 52 determines that low airflow temperature reading 68 is valid primary microprocessor 38 will use low airflow temperature sensor 54 in controlling compressor 40 and blower 22 and will just monitor high airflow reading 66 for diagnostics data logging or other reasons if however microprocessor 38 or 52 determines that low airflow temperature reading 68 is abnormal or beyond a predetermined valid range of values primary microprocessor 38 will switch over to controlling compressor 40 and blower 22 in response to.