Question about 2006 Chevrolet Silverado

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Fan motor my cabin fan will intermintly come on high speed then shut off this also happens when key is off and out

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You vehicale has what they call afterblow the blower will come on for a few minutes after the truck has been shut off and will run to dry the evaporator case out so you dont get a musty oder. ( normal concern)

Posted on Apr 06, 2014

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Posted on Jan 02, 2017

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SOURCE: the fan motor for the heater will start on high

Check under the right side of the dash for possible melted connector to blower motor resistor. There is a service connector available for this if it is the problem.

Posted on Jun 22, 2009

  • 14036 Answers

SOURCE: ihave intermintent wipers on a1995 chev g20, only

SOUND LIKE WIPER SWITCH IS BAD.

Posted on Nov 10, 2009

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SOURCE: blower motor only works on high speed 2000 suburban

Standard problem with GM, Blower Resistor needs to be cleaned or replaced. This unit is usually on the blower housing

Posted on Feb 28, 2013

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2002 GMC HD2500 8.1,when i turn the ac fan on high some thing in the dash vibrates,


Sounds like something fell down into the blower motor. You will have to remove blower motor and take a shop vac and run it thrue the vents.

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On a 2007 lincoln navigator the a/c fan motor will not shut off. the fan adjustment bars are showing slower but still the fan is on high


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2000 venture blower motor won't shut off with the ignition


Could be something in the key switch I suppose. There is a high speed relay for the blower that gets power directly from the battery, but the other speeds should go thru the fan switch and get power from the key switch.

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01- Dodge Caravan AC Heater Control it only works on high none of the speeds work when I rotate the switch from low to high. Is this a swith problem or a motor problem?


Most likely neither. The most common cause is that an electrical device called the blower motor resister block, has failed. This device provides all the slower speeds. It is generally mounted in the HVAC [Heating, Ventilation & Air Conditioning] box, very close to the blower motor. FYI, we mechanics call the fan motor inside the cabin the blower motor. The electric fan motor behind the radiator is called the cooling fan motor.
If the resistor block is OK, then you have either a bad fan speed switch or a melted electrical connector at that switch. 95% of the time, the resister block is the problem.
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05 Silverado, overheats when in 4-wheel drive under strain. Fixed once(so I thought) by replacing the water pump and thermostat. Happened a few months later. Again, 4-wheel, under strain. Wound up...


Instrument cluster - GM had problems with a part inside the cluster , Stepper motor , These faulty step motors caused the gauges to act erratically . 2003 to 2006 ! ALL GM vehicles . Just replaced a cavalier instrument cluster for what customer thought was a over heating problem .The fans come on low speed when engine temp. reaches 220 degress
The PCM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF if the engine coolant temperature at key-off is greater than 101°C (214°F) the low speed fans will run for a minimum of 60 seconds After 60 seconds, if the coolant temperature drops below 101°C (214°F) the fans will shut OFF. The fans will automatically shut OFF after 3 min. regardless of coolant temperature.
The PCM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 107.2°C (225°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set.
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed if required. This insures idle stability by preventing the fans from cycling between high and low speed.

Mar 31, 2017 | 2005 Chevrolet Silverado

1 Answer

The fan to the cabin heater and air conditioner in my 1987 cutless suplreme does not turn on, fuse is ok


no high speed ? fan motor relay, no slower speeds resister pack.or faulty fan switch.
Check motor with jumper lead from battery,but unplug power lead to motor first. check grounding wire to motor. if motor dont run replace!

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1 Answer

2001 Town and Country has only high speed fan both front and back fans. Connector to fan has 12v only on one of the 6 leads. Grounding the lead with the 12v on it turns fan on high speed. Where is...


if the blower only blows on high then it is you blower motor resistor that is located behind the glove box it has two screws that hold it in place

Jun 19, 2009 | 2001 Chrysler Town & Country

2 Answers

2002 Ford Taurus blower fan only works on high


fords are notorius for faulty fan switches, you will need to get a new one, but it will probably fail in a year or two.

Nov 10, 2008 | 2002 Ford Taurus

1 Answer

Vent fan is not shutting off


The blower motor speed control module is most likely shorted. This is very common on the gm w-body cars such as your grand prix.

Order and install a new blower motor speed control module and install. It is located in the hvac box, passenger side, near the blower motor.

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