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Air condition fan only works on high speed, no low speed

Air condition fan only will work on high speed

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You have a bad blower motor resistor. This is located under the dash close to the blower motor itself

Posted on Apr 14, 2009

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Posted on Jan 02, 2017

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Air conditioning fan shuts off and will only work on high. comes and goes.


try looking at your fan relays , located inside of a black box on the drivers side, under the hood, there are relays and fuses inside, 1 of them should be fan relay 1, and there should be a fan relay 2, i believe the 1 is for low speed, and the 2 relay is for high speed, also there should be a relay for the a/c. hope that this information has helped you.

Jun 18, 2011 | Chevrolet Colorado Cars & Trucks

1 Answer

Have two codes 1490 and 1489 what are they and how do i fix them


It's most likely low speed fan control relay circuit trouble.
There are separate relays and control circuits for high and low speed for the fans. This way if one messes up the other one should still work. Relays are in relay/fuse block under the hood. There is a diagram under the relay box cover that shows the function of each relay. The relays just plug in.

1489 = High Speed Fan CTRL Relay Circuit - An open or shorted condition detected in the control
circuit of the high speed radiator fan control relay.

1490 = Low Speed Fan CTRL Relay Circuit - An open or shorted condition detected in control circuit of
the low speed radiator fan control relay.

Either the relays are gone or the connector isn't plugged in, probably the connector if both the low and high circuit is out.

May 06, 2011 | 1998 Dodge Intrepid

2 Answers

My 2000 yukon xl air conditioner blows hot air in the rear and in the front at a idle


First, I would check that the a/c compressor is on at idle.
Then, I would check that the fan goes on.
After, that I would check that the plumbing is getting cold on the low side. If it is not, then I would look for causes for that, including but not limited to the r134a refrigerant pressure being too low.

It should read 25 psi to 45 psi on the low side when the a/c compressor is turning, which is normal.

If it reads 75 psi to 100 psi or higher and the a/c compressor is not turning, then there is a problem.

The a/c compressor could be wearing out (its pistons that is) and causing the pressure to not be high enough at idle speed.

Aug 17, 2010 | 2000 GMC Yukon XL

1 Answer

Air conditioning / heating system fan works on


Fan resister circute/switch needs to be replaced. Not expensive. Buy from dealer.

Aug 02, 2010 | 1993 Nissan Pathfinder

1 Answer

The one fan willl not come on but both will when motor is hot


I'm not familiar with your particular car, but this info may be of some help to you...

Dual fan cars work in a few ways:
1) Some only use one fan during normal cooling, and turn on the second either when the temperature reaches a certain level, and/or when the air conditioning is running.
2) Some use both fans for normal cooling, but at least one of the fans have a dual-speed motor. Generally only one has dual-speed motor, which operates at low speed during normal cooling cycles, and operates at high speed at a predetermined temperature, and/or when the air conditioning is running.

Based on this, it's possible that your system is working correctly, or you have the chance that your low speed portion of the cooling system is not functioning. Check the wires going to the fans. If there are only two wires, then it's a single speed fan. If there are three wires, it's a dual speed fan.

Based on that information, you should be able to determine if your system is working correctly or not.

Dec 13, 2009 | 1989 Honda Accord 4 Door

2 Answers

Car overheating


fan relay or fan motors also try the fan fuses

Oct 06, 2008 | 1999 Chrysler Concorde

1 Answer

1994 Hyundai Excel Air conditioning RADIATOR´S FAN works always very fast


this not really a problem as the fan speed is controlled by the high preasure switch in the ac system the hotter it is outside the higher the preassure will be in the system as hot as its been the preasure is high already when the compressor cycles it pulls suction on one side and outputs high preasure on the other the fans cool the condenser the higher the ambient temp the faster they go so all is fine...

Jun 08, 2008 | 1994 Hyundai Excel

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