If the A/C is on the same circuit as the coolant fans, then the A/C motor is going bad and drawing too much current. A local shop should be able to test the motor for a small fee, or, if you know how to use a multimeter, you can check the motor's resistance for shorts. You'll need to know the original motor specs before testing; the motor model #, maker, etc., should be somewhere online, or available from the maker.
The problem seems to be in the AC system, not the cooling fans. Check the wiring to and at the compressor. Possibly the compressor is seized, so when the AC is turned on the fuse will blow.
This is not the fan. It is the clutch on the air conditioner compressor. Not a cheap fix and not something that you can do yourself.
Are you sure the 40 amp fuse is for the fans? Maybe the A/C compressor has a short.
SOURCE: Radiator fan problem
Call up the dealer and ask what commands the fans to come on once the car reaches operating temp, on alot of imports, there is a fan control box of some sort that actually sends the sig to the fans to come on.
If it's the temp sensor and the computer tells the fans to come on you could be looking at a faulty computer.
This would deffinetly be worth taking to the dealer to diagnose so that you don't keep wasting your time and money chasing a ghost.
SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on
the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck
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
SOURCE: Cooling fans and AC on 2000 Jetta 2.0 litre GLS - not working!
worked on one of these last week as well done the door locks and gearchange.Cant remember but look around the rad area for a reostat pack ,also check the earth on the fans and for a feed as that will give you a clue what could be wrong ,but the fan should come on with the AC so something is amiss .My favourite is to run a feed from the battery and then try pushing it behind the positive ,and then do the same with the earth,Cant live without the AC here in alicante spain ,its still about 28 outside now and its 22.11 ,try it out then get back to me if you cant sort it because i have to go now to pick er indoors up from work
SOURCE: 1997 dodge neon. replaced coolant temperature
1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?
95 views
Usually answered in minutes!
×