2.6 on 190e cooling fans not running overheats in traffic
In the old days the cooling fans were operated by a thermal switch mounted in the radiator or high in the engine. Sometimes the switch was a dual stage switch to operate one or two fans at high/low speed or to operate two fans in a sequence. The switch in these cases would provide a supply to an electronic control to provide the speeds or sequence. Mostly the thermal switch either switched on the fans directly or through a relay.
Both the fan motors and the switches tend to be very reliable and in the case of a problem are fairly simple to eliminate by independently testing them and checking the supply. This becomes easier when you have discovered which system your car uses. Begin by checking the fuse. Your vehicle handbook should provide that information.
Late model cars could have the cooling fans switched on by the engine management system so apart from the fuse and motors, wiring, etc. the diagnosis could be more complex.
Feb 03, 2016 |
Mercedes-Benz E-Class Cars & Trucks