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What is wrong if the only air condition setting that works is high4 1-3 doesnt even blowand the AC light doesnt come on It will only blow on the highest setting Any Ideas?

You may have a faulty switch that controls the speeds on the a/c blower fan.


Why does my Rover 25 fan heater only works on 3 and 4 but does not work on the lower speeds?

The stage 1 relay has blown! it is located behind the glovebox door above the heater blower. # find it # pull it out # replace it job done:-)


2002 Chevy silverado fan blower only runs on speeds 3 4 and 5 where is the relay located?

Its not the relay, it is the blower motor resistor.


If you have a 92 jeep wrangler heater and ac are separate how many speeds is the ac fan not the heater?

I had one of these on a 1991 Wrangler and if I remember correctly it had 3 speeds. i currently have a 92 and it dose have 3 speeds


Why would a 1998 Honda Civic AC blower only work on settings 3 and 4?

I've had a similar problem on my 98 civic ex. There's two resistors wired to the fan control. One for speeds 1 and 2 and another for speeds 3 and 4. I suspect the one controling the 1 and 2 speeds has blown.


Grand prix fan blower only works on high?

u need a new control button switch the button that has 3 nobs on it that control temp .i had same problem only works on 5 right.


What would be the cause of your heat only working sometimes in your Hyundai Elantra when you can hear the switch clicking when you turn it?

Possibly a fan resistor. Does it work on only certain speeds like 1 and 2 but not 3 and 4?


Fan control switch on a Ford Festiva 1995 works in position 3 but not 1 or 2 fuses or contacts worn?

Could be switch Could be low speed relay Could be low speed winding on fan motor Could be fan motor resistor Uses 2 relays (one for High speed and other for lower speeds Motor has 2 windings one for High speed and otheer for lower speeds


2003 Chevy sivlerado heater blower quit working on speeds 1 2 only works on 3-5 whats the problem?

The blower motor resistor is bad.


How do you repair an air conditioner on a 1996 Nissan Sentra that only works on level 4 and nothing happens on levels 1 2 and 3?

A resistor block controls the speed of the AC/Heater fan. These resistors are switched on and off in various combinations to create the different fan speeds. When the resistors burn out, your fan will only work on the "HI" setting. The "HI" setting doesn't use any of the resistors and that's why it works. These resistors are near the blower and the blower is beneath the dashboard on the pasenger side. A/C is probably fine. If you try the heater, it will show the same problem as your question.


Why does the heater fan only works when the switch is in the high position of your 2002 Chevy prism not the first 3 positions?

replace the blower fan resistor located under the dash behind the glove box


What would cause the heater fan rear defroster to not work on a 1991 Chevy caprice the heater fan only works on the highest setting?

If the heater fan on your 1991 Caprice only works on "High" the problem is more than likely the resister assembly in your blower circuit or poor connections at the resister assembly. When the switch is in the "high" position the current does not flow through the resister assembly it flows directly to the coil of the blower relay. When the switch is in "low", "medium 1", or "medium 2" position the current flows through 1, 2, or all 3 of the resistors in the resistor assembly which results in the 3 different lower speeds. Check the resister assembly and replace if needed.