Question about AC Cars & Trucks

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So when the heater or Ac isnt on should the fan be running or not running?when i put my heater on the fan dont run at all But when i put my AC on it runs 5secs and then cut off and come back on

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6ya6ya
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Posted on Jan 02, 2017

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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

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  • 2 Answers

SOURCE: 2006 H3 Hummer AC/Heater Fan Motor

I brought my 2006 H3 in to the dealer for the same thing. My blower stopped working all together but it started as an intermittent problem. He said he had to replaced a diode or resistor either behind the switch on the dash that controls the fan or on the fan motor itself. Have not had a problem since but that was only about 4 months ago.

Posted on Apr 09, 2009

  • 4 Answers

SOURCE: blower not working on ac or heater etc.

replace the blower fan motor

Posted on Apr 16, 2009

wavoconqueso
  • 57 Answers

SOURCE: VIbration in AC/HEATER fan

I've had mice in my Nissan PU and actually caught one in a trap set on the floorboard; so I know they can get inside. They also knocked some of the fiberglass insulation into the blower motor so it vibrated as it was no longer balanced. You could have a dead one in your blower. Mine was easily accessible from under the passenger side under the dash. Three screws and the motor dropped so I could clean out the fiberglass.

Posted on May 09, 2009

Installer1
  • 97 Answers

SOURCE: 2002 honda civic Heater fan will not run and a/c will not come on

got a bad relay somewhere

Posted on Aug 20, 2009

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Ok when I have my heat fan on my 2006 dodge charger 2.17 it dont run hot but when I turn it off it do our when I turn on the ac it run hot


If the engine is running hot you may be low on coolant. Check this first. If coolant level ok, the rad fan may not be working to cool the engine. If the AC is operational, when you turn it on, the radiator fan should come on telling you the fan motor is ok. You still may have an issue with a fan control related to temperature. This can be caused by a fan relay/wiring/temp sensor/ecm. Make sure the thermostat is functioning properly as well

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Why won't the ac fan in my 2000 dodge Dakota stop running?


cause its burnt out from the worn ac motor drawing too much juice--need a new motor--change the heater core and ac evaporator at the same time-save lotta $

Jul 01, 2014 | 2000 Dodge Dakota Quad Cab

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Heater fan motors


The most common issue is the fan relay is NG or a bad AC/ heater switch (if we are talking about the AC/heater fan.

Apr 17, 2014 | 2005 Chevrolet Impala

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When you turn the A/C on does the elect. fan suppose to come on evenin cold weather and whitch temp. switch runs it?


Normally the ac fan (in front of the condenser) will run as soon as the ac is switched on. This condenser gets hot when the gas is being compressed and needs to have the heat removed for the system to work IT will switch on regardless of the ambient temperature as it is connected directly to the ac compressor clutch. IF you are referring to the heater fan inside then it will only work with the heater fan on or with both ac and heater on but will not always work with just the ac on.

Dec 24, 2013 | 1991 Oldsmobile Cutlass Ciera

1 Answer

Hyundai accent 2002 car high temparature during start ac


check see if cooling fan running could have faulty cooling fan relay or fuse.if cooling fan dont run when ac on car will overheat.AC COMPRESSOR PUT LOAD ON ENGINE.

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Kia air conditioner doesnt work


I have a 2007 kia rondo.Ac was working,parked it for a year,ac wasnt working,recharged,the ac,it worked for a month,an started again,blowing hot ai.If you let it set for hour would start working...then after a few days it would only work early morning,if you dont turn ac of,then it stop working,I see the clutch isnt kicking in,ir you try an put freeon in it soon as you start putting it in it would kick on.An its full of freeon.

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98 Saturn SL2, AC/Heater Clicking


You need to replace the heater/AC blower motor the motor shaft bearing is defective..

Jun 18, 2017 | Saturn SL2 Cars & Trucks

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Unable to get my 2003 chevy blazer to start. has been acting funny. the hot air has been running cold and takes the ac a long time to get cool. the engine runs hot.


get a mechanic to have a look ,water level low hence the heater is cold and ac taking a long time to cool because the fan isnt starting up when ac is turned on ,Sounds like your fan is playing up and you may have cooked the head gasket??

Sep 12, 2009 | 2003 Chevrolet Blazer

2 Answers

P0481 on grand prix 2002. cooling fans work with a/c on and relays seem ok. vehicle temp gauge opertaes ok and does not seem to get hot.


sounds normal, the fans were made to run continuous w/ ac running, but on sensor when ac is off. if car isn't overheating, the fans are probably running from time to time ,but your just not catching them running

Sep 04, 2009 | 2002 Pontiac Grand Prix

2 Answers

FUSE BOX DETAILS


left to right...
1. empty
2. e flashers
3.horn, brake lights
4.clock, trunk light, inside light, radio
5. rad. cooling fan relay (AC only)
6. right side running lights
7. left side running lights
8. right high beam and indicator
9. left high beam and indicator
10. right low beam
11. left low beam
12. reverse,turn signal and inst panel
13. main and transfer fuel pumps, auxiliary air reg., ox sensor heater
14. license plate and glove box light
15. wipers
16. rear defogger
17. heater blower (no AC)
18. cig lighter
19. rad cooling fan (no AC)
20. Heater blower (AC)
21. rad cooling fan (AC only)
22. empty
23. Ox sensor, idle stabilizer,seat belt warning relay, (Digifant only, control unit, idle boost control, idle boost valve)
24. inst panel lights, heater control lights
25. reading lamps
26. empty
27. empty
28. empty

Hope this helps...;-)

Apr 17, 2009 | 1992 Volkswagen Fox

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