Question about 1997 Oldsmobile Cutlass Supreme

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97 cutlass running hot an overheating already changed thermostat an temp sensor fans not kicking on checked relays. is there another relay or sensor that runs these

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It's a 97 so it could be that the fan motor has died, try jumping power right to the motor if nothing hapen's then u will know it's the motor itself

Posted on Jun 05, 2010

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SS w/3.8l engine. What would cause the first electric fan not run but when temp rises the second fan will come on?


The coolant fan should kick on when temp reaches 192 degrees. Have you changed your thermostat? The 2nd fan is for the a/c. If car is running hot, it's probably thermostat or cooling fan

Apr 05, 2016 | 2001 Chevrolet Monte Carlo

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Hi i have changed the head gasket on my vw polo and now it is overheating on every journey the fan doesnt seem to come on any ideas what it could be as i have put new temperature sensors and thermostat and...


Hi Marie.

Test if there is voltage to fan motor with engine hot (use a test light or a Voltmeter). If there is 12VDC to fan motor and motor does not turn, then the fan must be replaced. An alternative way to test the fan would be energizing the motor by connecting it to 12VDC. If fan does not run when motor is energized, then the fan is defective.

If fan does not get power fuse, fan relay, thermostat and wiring must be tested. If you have already replaced thermostat, test the rest.

Check the fan fuse first. Most VW use a 30 Amp fuse located in the fuse plate. Refer to the car owners manual for fuse location. Depending on the year of your Polo there is a Coolant Fan Control Relay on the main relay panel. If the relay is good it must power the fan when the engine is hot. Before going for the relay check that two of the relay's contacts are getting power. If there is no power to the relay and fuse is good it means that there is a wiring problem.

Regards.

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Aug 19, 2011 | Volkswagen Polo Cars & Trucks

1 Answer

99 oldsmobile cutlass fans only come on whn da a/c is running I've replace sa thermostat and one coolant temp sebsor watelse culd cause these problem


The drivers side fan is controlled by a engine temp sensor located just above the oil filter on a 3.1 V6. The fuse and relay are located on passenger side of engine in front of the coolant tank and under the crossbar. This fan will only come on when engine temp sensor tells it to, usually when the temp gage on the dash reads almost to hot.

The other fan is controlled by the A/C and should come on almost instantly when you turn on the A/C. Its fuse and relay are in the same spot as the other fans.

Hope this helps.

Aug 09, 2011 | 1999 Oldsmobile Cutlass

3 Answers

2000 oldsmobile silhouette, just changed thermostat, still running hot, coolant fans not coming on, fuses in box okay! Is there a relay somewhere else that I need to have checked ?


Yes, there are 3 cooling fan relays. A signal is sent to the PCM from the temp sensor to kick them on. Probably a bad temerature sensor causing the fan not to kick on, but you can swap relays to see if it does first.

Jun 13, 2011 | 2000 Oldsmobile Silhouette

1 Answer

My Caravan radiator fans run constantly and the temp gage never moves off "cold". The engine is not overheating. I have replaced the temp sensor and the thermostat. No change.


The temperature sensor may be controlling the fan via a relay; these can fail by welding the contacts together remaining permanently 'on.'
Locate the fuse (and possibly relay) box, check inside the cover for a layout that identifies which fuse or relay controls the fan; they are often on their own fuse and definitely on their own relay.

Nov 10, 2009 | 1996 Dodge Caravan

1 Answer

I have a 2003 VW Jetta 1.8t that is overheating. Replaced the thermostat, temp sensor, water pump. Fan will run when AC is on, but haven't had it running in hot enough weather to see if the cooling fan...


Assuming engine tune / mechanical condition is not the cause of the overheating:-
Ensure cooling fan is cutting in at the appropriate engine temperature - check operation of the fan controlling relay,
Ensure fan switching control temperature sensor is serviceable,
Ensure cooling system is filled properly, taking care to bleed out air where necessary,
Ensure coolant pressure cap is of correct rating and in serviceable condition,
Check coolant hose on suction side of waterpump is not softened and collapsing at engine revs above idle,
Ensure radiator core is not blocked or cooling airflow inhibited by insects etc.

Aug 11, 2009 | 1996 Volkswagen Jetta

1 Answer

97 Pontiac Sunfire overheating


check the engine coolant temp sensor, if the sensor is failing it will read always cold and not turn the fan on, if everything else looks and tested ok try the ECTS (engine coolant temp sensor)

Jun 20, 2009 | 1997 Pontiac Sunfire

1 Answer

1989 Jeep cherokee Laredo over heating and the fan wont kick on, plenty of water in the radiator? How do I check to see if it is the thermostat sticking closed?


when it's overheating check to see if the lower radiator hose is hot. if not therm is bad. If OK, check temp sensor on thermostat housing. signal from there goes to the computer, then to fan relay to turn on fan.

May 09, 2009 | 1989 Jeep Cherokee

2 Answers

My 97 dodge intrepid 3.5L is running hot.


Most likely a bad fan relay, or a bad temp sensor. Does the fan come on with the A/C? If not, most likely the relay, if so, most likely the temp sensor.

Mar 13, 2009 | 1997 Dodge Intrepid

1 Answer

1990cad deville overheating


the first thing to check is to have the engine running. as soon as it reaches operating temp the upper radiator hose should get hot. if it doesn't then it's the thermostat. if it does then i believe your water pump is probably not circulating like it should and it should be replaced. however before replacing the wter pump make sure that the wire to sending unit is tight and not giving you a false reading. if your model has electric fans make sure the fans are running when the engine is hot. if they are not running check the relay in the fuse box for the fans with the engine running switch out the fan relay with the a/c clutch relay. ifthe fans kick on replay the relay with a new one. if they don't click on the it's either a bad wire or the temp sensor probe is bad. hope this answers your question. please rate this solution...thanks.

Aug 30, 2008 | 1990 Cadillac SeVille

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