Code B449, High Side Temperature Too High

Code B449 is designed to disengage A/C compressor clutch in the event the high side refrigerant temperature exceeds 199°F (93°C). The A/C compressor clutch will reactivate once high side temperature falls to less than 199°F (93°C). Possible causes for excessively high A/C head pressures should be checked. Diagnose A/C system for refrigerant system performance.

Fig 1: Code B449, Schematic, Coolant Temperature Too High