TC reported both driving cab air-con blowing warm air. Unable to reset. ~~~~~ 3551 & 3552- Cab A/c both check & Found low freon. Checked CCU Unit & Evap unit No leak found. Discharge freon from system & Vacumn system-Ok. Recharge freon to criteria-Ok. Both Cab A/c able to Cut In/Out-Ok. Both Cab A/c cooling.   Jimmy / Hakim.  17.09.2023.