Question about 1993 GMC Suburban

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The air conditioner fan won't come on the low speed. All others work.

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Are there filters in a GU 2004 car air conditioner?


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probably find that the low speed fan resistor has burnt out or the vent control module is not operational

Jan 06, 2016 | Cars & Trucks

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3 speed fan barely changes speed


You are talking about your blower fan for the air conditioner and heater right? More information will be needed to solve the problem.

When you say it barely changes speeds, does that mean it doesnt speed up, or doesnt slow down? By that I mean, is it "stuck" on low, or high?

Most blower fans run at different speeds through the use of a multi-stage resistor built into the fan switch circuit. Low speed is a high value resistor, medium speed is a low value one, and high speed is the fan running without any resistance.

If your fan is running on high and doesnt seem to want to run on lower speeds, the resistor pack may be failing. If the fan is running on low speed only, it may be that the fan itself is beginning to fail, or that the lubricant in it has gotten gummy.

Dec 07, 2015 | Cars & Trucks

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Dtc code p1490 fan olny comes on when air conditioner is on


P1490 Low Speed Fan CTRL Relay Circuit. You need to check and make sure the cooling fan is coming on when the engine reaches operating temperature and when you turn the A/C on. If not, replace the Low Speed Fan relay.

Jun 23, 2011 | Mitsubishi Eclipse Cars & Trucks

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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 conditioner goes off when fan speed is increased


when it's on 'auto', the fan adjusts according to the temp in the car and the temp setting you have it set at. try setting the auto temp control down to 65, then hit the "-" one more time to send it to "LO" - the fan should automatically jump up to max.

Jul 01, 2010 | 2001 Audi A4

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The cooling fan on my 2001 ford escort SE will not work normally


Check the coolant temperature with the car stopped. At idle with the hood up keep the thermometer in the coolant. Confirm if the coolant is not overheating but the engine is!!

Run the A/C keeping the thermometer in the coolant and allow the fan to kick on.

If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Read the description of the Taurus where the low speed is used for normal operation when temperature is required but the high speed is activated when the A/C is on. The circuit is simple.

In your case the low speed has to be activated for the A/C to go into the high speed. The fact that the high speed is working and low speed is not indicates the low speed of the fan is defective.

Other problems such as the thermostat or plugged cooling system(radiator clogged) could be the root problem!

Hope this helps?
2010-09-05_004249_03_focus_cooling_fan_resistor-3xudhdxidxafwe4mdbsnm14c-4-0.jpg

dual_speed_fan_diagram-3xudhdxidxafwe4mdbsnm14c-4-2.jpg

Jun 24, 2017 | Ford Escort Cars & Trucks

1 Answer

Air conditioner wont turn on


It might be the fuse for the AC compressor. Check to make sure the blower motor/fan is working by putting it on heat, or vent and adjusting the level from low to high (not temperature). Fan speed. Hope this gets you started.

Apr 03, 2010 | 2006 Hyundai Sonata

1 Answer

Heater fan only works on "high speed"


All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
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Air conditioner fan motor speed surges


needs a new blower motor controller

Dec 25, 2008 | 2002 Lincoln LS

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Car overheating


fan relay or fan motors also try the fan fuses

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