Question about 2009 Chevrolet Captiva 2.4

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Fan, full on only !!

Fan is either on full or off no control

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Change your blower motor resistor

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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1 Answer

Engine cold. Start engine reading says engine hot ac off. Fans run all time.


Are the fans running on low or high ?
Circuit/System Description
The engine control module (ECM) commands the fans ON in either high speed or low speed, depending on cooling requirements. In low speed, both fans are turned ON at a reduced speed. High speed has both fans turned ON at full speed.
In low speed operation, the ECM applies ground to the coil side of the fan low relay. This energizes the coil and applies voltage directly to the left cooling fan through the switch side of the fan low relay, which is fed by the fan 1 fuse. The right fan is connected in series to the left fan through the de-energized fan control relay so that both operate at low speed.
In high speed operation, the ECM applies a ground to the coil side of the fan low relay, the fan control relay , and the fan high relay. On the fan high relay, the energized coil closes the switch side of the relay and applies voltage directly to the right cooling fan through the switch side of the relay, which is fed by the fan 2 fuse. At the same time, the ECM energizes fan control relay pulling the switch side over, providing a direct path to ground for the left cooling fan, which has voltage applied through the energized fan low relay. In high speed mode, the fans are operated as a parallel circuit with full voltage applied to each.
You should have it hooked up to a scan tool that can read engine sensor data parameters . Check for DTC'S - diagnostic trouble codes etc...
Circuit/System Verification
  1. If DTCs P0480 or P0481 are set, perform those diagnostics first.
  2. Ignition ON, verify with a scan tool that the control module is not commanding fan activation.
  3. Ignition ON, observe that the fans are not activated.
Your best bet is to take it to a ASE certified repair shop !

Jan 10, 2016 | 2009 Chevrolet Silverado 1500

1 Answer

In cold temp,heater motor do not run


you mean low heat. at all ducts with full fan speed and blows hard,
here is the correct order.
1: engine at 180F or more holding, a absolute must.
2: fan runs at full speed on HIGH, (sounds like it)
3: fan actual blows (felt) at full speed, to any vent, try all vents.
4: now heat, will happen, if not, the dampers are closed or wrong.
damper can be complex on newer cars,they have motor controlled damper servos';

is this just blower fan dead? problem. on high, if yes say so.

Jan 26, 2014 | 2008 Suzuki Grand Vitara

1 Answer

Chrysler lhs climate control


climate control requires the ac to work as well to vary the heat temperature and remove humidity from the cabin air. Check that the ac is working .

Dec 14, 2013 | Cars & Trucks

1 Answer

Electric cooling fan runs constantly


sounds like the fan solenoid is stuck. or keep in mind when defroster is on or any climate control in this car the ac compressor will run .wich in turn will kick on the electrick fan .try it with the climate control completely off. let me know

Dec 02, 2013 | 2002 BMW 5 Series

1 Answer

The fan that controls the A/C and heater is stuck in the on position & running full blast. Puching the off button or manually puching the fan buttons does not do anything. The fan continues to run full...


Sounds like a problem with the fan switch. If you can find the fuse for the blower motor, you could pull the fuse to stop the fan until you can get the problem fixed.

May 09, 2011 | Infiniti QX4 Cars & Trucks

1 Answer

Blower running full power - unable to control


your high speed fan relay contacts are stuck together that power the fan,normally the selectot switch on the dash controls power to the relay for on and off,but when the contacts weld themselves together you no have control over the fan speed even with the key off,its probably under the hood in a black box marked relays and fuses,remove the relays one at a time till it kills the fan,sometimes hitting the offending relay on the ground will break the contacts loose,but still replace it

Jun 15, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Car - interior fan control working but only on full or 1 bar


switch is bad look in salvage yard for new used arts

Jan 17, 2010 | 2005 Mazda 3

1 Answer

Heater only blows hot (well, warm) on full speed of fan


Replace the temp control on this car, it should be electrical control not cables.

Dec 03, 2008 | 2000 Ford Escort

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