jeremy156
Active Member
Hi,
My W210 developed an odd fault after a long journey.... it seems the electric fans in front of the radiator switched on after I parked and clearly didn't stop until my 100Ah battery was flat the point that the poor thing barely read 6V on my meter! By the way, I checked the residual current to keep the car alive at 130mA, sounded about right. Anyway, after I'd re-charged the battery overnight, I put it back into the car and sure enough, the fans started. When I turned the ignition they stopped and I had a short drive. As soon as I stopped, the fan came on again. The only way I could stop it was to disconnect the battery. I later realised I could disconnect just the fan when I discovered the connector hidden behind a panel behind the grille. Now I can leave the battery connected and rely on the engine's fan to keep it cool (and avoid using the a/c).
So... my challenge now is to figure out why the main fan feels the need to run whenever the ignition is off. Has anyone experienced this before?
My W210 developed an odd fault after a long journey.... it seems the electric fans in front of the radiator switched on after I parked and clearly didn't stop until my 100Ah battery was flat the point that the poor thing barely read 6V on my meter! By the way, I checked the residual current to keep the car alive at 130mA, sounded about right. Anyway, after I'd re-charged the battery overnight, I put it back into the car and sure enough, the fans started. When I turned the ignition they stopped and I had a short drive. As soon as I stopped, the fan came on again. The only way I could stop it was to disconnect the battery. I later realised I could disconnect just the fan when I discovered the connector hidden behind a panel behind the grille. Now I can leave the battery connected and rely on the engine's fan to keep it cool (and avoid using the a/c).
So... my challenge now is to figure out why the main fan feels the need to run whenever the ignition is off. Has anyone experienced this before?