Question about 2005 Peugeot 405

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Coolant fan will not come on and car overheats

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  • 101 Answers

There is a switch on the thermostat houseing and one on the radeator.

Posted on Aug 01, 2009

6 Suggested Answers

6ya6ya
  • 2 Answers

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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

devdeep dhar
  • 375 Answers

SOURCE: car overheats when heat is put on. both fans

Have you checked the Heat Gaskets. They may be defective or not functioning. Also Check the Cooling System's chemical completely checked. Also ensure that the Thermostat is not defective. Also try replacing the thermostat.
Thank you Sir, Have a nice day.

Posted on Sep 26, 2009

  • 21 Answers

SOURCE: 96 monte carlo coolant problems;changed

Is coolant flowing through the radiator? Possible water pump, radiator blockage, or air flow to/through the radiator blocked or restricted. When the fans come on is there warm air coming from them?

Good Luck

Posted on Oct 01, 2009

Testimonial: "waterpump was replaced recently and fans are blowing warm air"

  • 13 Answers

SOURCE: No Heat, fan blows cold

clogged heater core perhaps, easy fix unless you have one of those internal hater cores accessible through the glove compartment.

Posted on Oct 05, 2010

acoates
  • 454 Answers

SOURCE: car overheats. i unplugged temp sensor and fans

Hello Guest and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2005 Chevrolet Monte Carlo, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose your overheating 2005 Chevrolet Monte Carlo

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

Posted on Dec 27, 2010

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2 Answers

What cause of overheat from engine


an engine will overheat if the rad cooling fan is not working, this will have to be check to see if its the fan motor, the fan relay. low coolant level, top up coolant check for leaks. could be head gasket problem, bad water pump(impeller worn).

Aug 08, 2014 | Daihatsu Charade Cars & Trucks

1 Answer

Overheats


there is a few ways cars can overheat. first let the car warm up in idle and make sure the engine cooling fan come on before the car gets to the hot level, if the fan comes on make sure you have enough coolant in the radiator not just the over flow bottle, the thermostat could be bad and letting the car overheat, check your coolant hosses to make sure thy are not bad and colapsing, and last is check the engine oil to make sure the is no coolant getting in there if so then you have a blown head gasket

Mar 26, 2012 | 2002 Ford Thunderbird

1 Answer

Overheating my car continuously overheat


CHECK FOR LOW COOLANT LEVEL AND REPLACE THERMOSTAT AND THE RADIATOR PRESSURE CAP.IF CAR OVERHEATING AND COOLING FAN NOT WORKING.CHECK COOLANT FAN FUSE AND RELAY.IF BOTH OKAY,HOT WIRE COOLANT FAN,IF FAN WORKS, PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR,OR FAULTY PCM, IF COOLING FAN DONT WORK WHEN YOU HOT WIRE FAN.THE COOLING FAN ASSEMBLY NEED REPLACING.

Apr 22, 2011 | 1993 Lexus Es 300

1 Answer

Honda 2001 civic replaced radiator, electric fan not working and overheats..why/


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.

Jan 01, 2011 | 2001 Honda Civic

1 Answer

Car ran hot now it wont start at all


THE ENGINE IT WONT CRANK IF OVER HEATED CHECK COOLANT LEVEL IF LOW ADD COOLANT.REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.IF ENGINE STILL OVERHEAT AT A STANDSTILL OR IN A LONG LINE OF SLOW MOVING TRAFFIC.COOLANT FAN SHOULD COME ON.IF ENGINE OVERHEAT CHECK TO SEE IF COOLANT TURNS ON IF NO.CHECK COOLANT FAN FUSE AND RELAY.IFBOTH OKAY HOTWIRE COOLANT FAN TO SEE IF FAN RUNS IF NO REPLACE COOLANT FAN MOTOR. IF FAN RUNS PROBLEM COULD BE PCM OR THE COOLANT TEMPERATURE SENSOR FAULTY OR DAMAGE WIRE CONNECTOR TO COOLANT FAN.USE A CODE SCANNER TO LOOK FOR PCM OR ECT FAULTS.IF EVERY THING CHECK OUT OKAY LOOK AT ENGINE OIL DIP STICK.IF IT LOOKS LIGHT BROWN OR LIKE MILK SHAKE YOUR HEAD GASKET BLOWN.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER TO ENGINE TO HELP RAISE BOILING POINT.WHEN OUTSIDE TEMPERATURES HOT.

Aug 05, 2010 | 2000 Oldsmobile Alero

1 Answer

What will cost your car to overheat


overheating can be caused by several things:
1. thermostat stuck closed.
2. low coolant level
3. leaking coolant
4. fan that does not turn on to cool radiator
5. FAN DOES NOT TURN ON WHEN A/C IS TURNED ON.

Jul 17, 2010 | 1997 Oldsmobile Aurora

5 Answers

Car will overheat while at idle


yes the head gaskets leaking on modern aluminum head engines is all to common. never overheat them, if they start to get hot shut it down and find out why, it can of course be the fans and plugged radiators or faulty thermostats but sounds like in your case the head gasket is leaking and combustion gas is entering the cooling system and this causes an overheat

Jun 08, 2010 | 2002 Mitsubishi Galant

1 Answer

My car overheats can't find the fan relay. help where is it?


Does it only overheat while sitting? Then the fan motor or relay could be bad. Just follow the fan motor wiring. It is probably in the relay block center.
The fans do not come on when car is in motion. Then thermostat is bad or coolant is bad or water is bad.

Oct 01, 2009 | 1988 Pontiac Grand Am

1 Answer

When idling saturn ls 4dr sedan wants to overheat


Sounds like either you are low on coolant or the cooling fan isn't working. With engine cool remove radiator cap and check coolant level, top off if necessary. If full start engine and turn on A/C full blast, full cold the cooling fan should come on almost instantly, unless there are two individual cooling fans in which case only one may turn on. If no fans turn on check all fuses whether related to fan or not. If all fuses fine try swapping relays around, they are usually all the same size/style. If fan still doen't work you have either an open positve or ground side of the circuit, Which will require wiring schematics and a multimeter. If coolant full and fan/s turn on and engine still overheats you'll need a new thermostat installed.

Mar 24, 2009 | 2000 Saturn Ls 4dr Sedan

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