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The coolant fans and radiator fans are new replaced and both fans don't work when car is turn on and car overheats on the Lexus es300.

Car overheats, and fans don't turn on.

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  • Lexus Master
  • 2,598 Answers

The air con fan comes on when the air con is engaged, the engine fan comes on only when the engine reaches operation temp. controlled by a temp. switch. on the block or radiator .

Posted on May 07, 2017


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017

  • 1596 Answers

SOURCE: 95 grand am radiator fan only runs with AC on

Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson

Posted on Feb 04, 2009

  • 290 Answers

SOURCE: The Lexus car remote key control model ES300

try this:

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.

2. Insert key into the ignition (DO NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.

4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.

5. Press any button on remote for a minimum of 1 second.
System should now lock and unlock doors once.

6. Close and open drivers door.

7. Press any button on remote for a minimum of 1 second. System should now lock and
unlock doors. Once to confirm programming, twice to indicate programming failed.

8. Repeat steps 5, 6 and 7 for additional remotes.

Posted on Mar 23, 2009

  • 335 Answers

SOURCE: car overheat

The rad fan is required to keep your engine at a normal operating temp. When you are going at hiway speeds the fan is not needed. When you stop then the fan has to operate to keep the engine cool.If the fan is not operating, it could be the fuse or fan relay or temp sensor or computer This problem should be checked by someone who is a professional..

Posted on May 09, 2009

  • 6674 Answers

SOURCE: radiator fan will not turn on and car overheats.

Check rad fan relay & or fuse under hood in fuse/relay box on drivers side fender area. Map is on underside of cover.

Posted on Jul 12, 2009

  • 22306 Answers

SOURCE: fiat seicento overheats, had new radiator switch,

check for a feed to the radiator switch fan ?? first

Posted on Sep 24, 2010

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You should never remove the thermostat unless you plan to replace the old one with a new one. Computer controlled cars rely on temperature to adjust fuel mixtures for when the vehicle is warming up and when it reaches operating temperature. You should first inspect for any sign of coolant leaking. Drain the coolant and flush the system by flushing water into the radiator neck with a garden hose for about 10 minutes or more if needed. Then get a new thermostat and drill a small hole in the flat surface ring that surrounds the thermostat and install it and a new gasket on the housing. Replace the radiator cap also. fill the system with coolant and let the engine run with the cap off until it reaches running temperature. Top off the system and install the cap if the car runs at the normal temperature.If at any point you think the car is getting too hot, install the cap THEN shut the engine off and let it sit. You can also monitor the fans to see when or if they are coming on. Turn on the air conditioner but adjust the temperature to hot. One of your cooling fans runs off of engine temperature and the other runs off when the compressor is engaged. If it does not come on with the compressor, the fan relay may be bad. Let me know if you have questions and I can walk you through them if you need me to.

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My 1992 Lexus ES300 overheats after driving it a short distance (4 miles). Checked radiator, hoses, all looks good and no leaks. Please tell me what else could cause the engine to overheat.

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93 lexus es300 overheating

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I went full tilt and replaced the radiator, water pump, thermostat, radiator cap and timing belt. I have 85,000 miles on the car and it was about time to do these things anyway. It is running like a new car now.

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