TC feedback cab air-con was not working.Unable to reset. Cab was warm. ~~~~~ Fault unable to duplicate in depot. Checked 3682 cab aircon to be operational. Verified fan speed was at high and able to achieve temperature of 17ºC. Verified both LP and HP within criteria. Replaced cab filter and monitor for 1.5hrs with no fault. Car was cooling.  /TEH.A.M/07.07.22