1988 Mercedes-Benz 300 "cause relay stick cooling fan" Questions

...cause is a sticking/stuck thermostat. Once problems have been found and resolved drain and refilll cooling system with a 50/50 solution water/antifreeze. Also replace the radiator cap unless you have ...

...relay's internal contacts have burn points, causing the contacts to stick together at times. There may also be no problem at all. If you are running your A/C, or have your defroster on, which also ...

...cooling fan runs continuously from the moment the vehicle is started and does not stop until it is switched off. This can be caused by a sticking fan relay, remove it and see if the fans go off, tap ...

cause sever engine damage i.e. headgasket or cracked block. also be sure the radiator has plenty of coolant and is functioning normally hope this helps Fuse box under the hood drivers side just switch

...cause fan to run a lot. If this is not the case, take truck in for diagnoses at a good shop, could be a faulty heat/fan sensor or sticking relay. Check the attached links,instruction and guides, Good ...

cause erractic codes The codes are p0106 p0421 p0401 the temperature cooling sensor, The sensor's output is monitored by the engine computer to regulate various ignition, fuel and emission control

...even with the ignition switch off. Your most likely cause is a sticking relay or a short to power. Don't discount the fact that the short to power can occur inside of the electric fan

...ON. If the service engine soon light is OFF, the fan relay might be stuck closed. Replacing the relay with a good one solve the problem. The third cause is a faulty Engine Computer, but it is

...cooling system thermostat. When they fail, they either stick open or closed. They only cost a few dollars, so replacing it first would be the first step. If stuck closed, that would represent the ...

...the engine cooling fan, might be the fan relay sticking causing it to continue to run. And if the heater blower is the issue, check the resister, maybe grounded in itself. Neither is very