1992 grand Caravan 3.3 with 2 small coolant fans at radiator. Coolant fan will not work. Hot wired electrics and it worked fine. Replaced temp sending unit next to radiator hose at intake manifold. Replaced 2 each- 4 pronged relays on passenger fender well. Those are the coolant fan relay right? I'm lost. HELP ME PLEASE!
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electric fans start to operate when the coolant temp reaches around 88 c and will run continuously while the coolant is above that temp
if you have ac then there is a fan that cools the condenser in front of the radiator and that will cycle according to the ac compressor cycles
Could be.. is the system FULL? Air in it can cause some odd things. When engine and coolant are COLD (as in after sitting over night), open the radiator cap. Top off the overflow res with a 50/50 antifreeze / water mixture to HOT mark. Start engine, turn heat to hot and fan to high. Top off RADIATOR with same 50/50 mixture slowly & gradually. As the coolant circulates, it should bring any AIR trapped in the system (from heater core & engine block) to the radiator where you can replace it with the 50/50 mix. Once the coolant is HOT and stays level - about an inch under the opening, close the radiator. Monitor the overflow res and add as needed. Good luck!
it could be you have an air lock in the cooling system
remove the rad cap from the rad, start the engine and let it run until the coolant drops (add to fill it back up) or until the coolant boils out of the rad spout.
maybe pull the heat sensor. -replace it OR clean it off, reinstall it.
had the same problem in 1994 grand am, done all that and wiring harnness never found it , put jumper wire to ingition switch turn the key on fan came on.. its not right but it fixed it for ten years. before doing this check for power to relay look at plugs to relay and prongs for fuses. Some ans are controled by ingition switch, remove key from ring while running lift key see if it comes on
HOT WIRE FAN IF ITS DONT WORK COOLANT FAN FAULTY.IF COOLANT FAN RUNS WHEN HOT WIRED. COOLANT TEMPERATURE SENSOR FAULTY OR LOOK FOR BLOWED FUSE AND FAULTY COOLANT FAN RELAY.WHEN YOUR FAN WORKING AND VECHICLE STILL OVERHEAT REPLACE THERMOSTAT.
HOT WIRE COOLANT FAN. STILL DONT TURN ON REPLACE FAN ASSEMBLY. IF COOLANT FAN DOES TURN ON WHEN HOT WIRED.CHECK THE FAN RELAY OR FUSE ALSO SCAN VECHICLE FOR FAULTY COOLANT TEMPERATURE SENSOR IF ENGINE COOLANT TEMPERATURE IS 190 DEGREES AND SCANNER SHOWS 80 OR LOWER COOLANT TEMPERATURE SENSOR FAULTY.
The fans are actuated by coolant temp in the radiator. It is possible to have overheated coolant in the radiator, causing the steam, and your engine not overheating...the temp sensor for your engine is reflecting the engine temp, not the temp of the coolant in the radiator. You problem could be a bad temp sensor at the radiator...not allowing the fans to come on. Good Luck! I hope you find this to be very helpful!
yes, the engine gets hot and has a shut off to protect it from overheating to badly. Repair the fan and see if the problem is corrected. If not please let me know. Thanks
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