Engine cooling fans stopped working
- Thread starter dlk31363
- Start date
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If you have answers, please help by responding to the unanswered posts.
Gottasmilealot
Well-known member
Be sure your coolant/antifreeze level isn't low. If it gets too low, it can get below the sensor that controls the fan, and the fan won't come on when it should. You'll start to run hot at traffic lights when stopped, but the engine will be ok at speed. That's the first sign on my vehicles. The cure is simple... fill the reservoir to the proper level. If that doesn't cure it, it could be other causes, like a defective sensor, but you might as well check the simple things first.
Karl
Moderator Emeritus
If fluid level is o.k., check for 12V at the thermostatic switch mounted on the radiator (you'll only read 12V on one of the pins). No power? Check fuses or fusible links. Power? Remove plug from thermostatic switch and jumper the 2 pins in the plug - fans should come on. If they do, you have a bad thermostatic switch.
Thanks Gentlemen,
We top off the coolant but could not find the sensor to the radiator. Any ideas on where we might locate it? Looked from the front but did not see any wires going to the radiator. My Dad looked under the cover from inside the MH today and said that he didn?t see it on that side ether. I'm off tomorrow so we will look harder.
We top off the coolant but could not find the sensor to the radiator. Any ideas on where we might locate it? Looked from the front but did not see any wires going to the radiator. My Dad looked under the cover from inside the MH today and said that he didn?t see it on that side ether. I'm off tomorrow so we will look harder.
scottydl
Site Team
Look for wires around your coolant reservoir tank, if that's separate from you radiator. That's where the sensors are on most late-model cars, and also where coolant is added if needed.
Karl
Moderator Emeritus
Scotty,
Sorry, but that's not the place to look. The coolant recovery tank has nothing to do with controlling engine temperature. It will be a small sensor mounted directly on (into) the radiator. It will normally be near the bottom of the radiator.
Sorry, but that's not the place to look. The coolant recovery tank has nothing to do with controlling engine temperature. It will be a small sensor mounted directly on (into) the radiator. It will normally be near the bottom of the radiator.
scottydl
Site Team
No need to be sorry, I appreciate being corrected when I'm wrong! ;D
