I tested today the ACC monovalve with a test light,it gets power,does not
let the water thru,its cold,only the aux pump in front of it warms up,so,I assume is defective.On this model 94-95 W124 the monovalve(heater valve) and recirculation pump(aux pump) are one part...so is there any way to repair it or I have to buy the whole unit(about 150$)?anybody worked on it before?

I don't recall and cant find a picture of the part.
Anyone know off the top?

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ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

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