One problem related to air conditioner has been reported for the 2003 Mitsubishi Diamante. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mitsubishi Diamante based on all problems reported for the 2003 Diamante.
Heater core (and a/c condensate) leaks into passenger compartment causing window to "fog up". This could be very dangerous as it impairs the drivers sight.
| Air Conditioner problems | |
| Equipment problems |