Mercedes® Air Conditioning Mono Valve985, 1981-1985 (123)

Performance Products knows how important a proper automatic climate control system is to comfort and luxury. If your heater fails to produce heat when you want and also produces heat only from the defroster vents, plenty at idle and little at higher RPMs you might just have Failed Mono valve. The mono valve is an electrically operated solenoid valve that is controlled by the Automatic Climate Control System. This valve is repeatedly opened and closed to adjust the engine coolant flow to maintain the desired heater core temperature. Replacing this valve can breathe new life into malfunctioning automatic climate control system. Trust Performance Products to get your baby running right!