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Old 01-02-2010, 07:02 PM
fafa401 fafa401 is offline
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Default AC/Heater Fan issue?

In my 02' "Tremor" the Heat and Air work fine, my problem is simply that, there is 4 different "speeds" or "settings" I guess they are called...

Mine will only work on the highest setting, which can become a pain.

I am not sure if I posted this in the right place, so I apologize in advance, any help is appreciated in fixing this problem, i'd rather not have to take it to a shop for something small.

Thanks
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Old 01-02-2010, 07:08 PM
STL STL is offline
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I believe this is a problem with just the panel a new one from a junk yard will correct this.
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Old 01-02-2010, 07:28 PM
fafa401 fafa401 is offline
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Could you be a little more specific when you say "panel"?

I put "novice" in my tittle for a reason.
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Old 01-02-2010, 07:35 PM
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Replace this

2001-2010 ranger will work
1995-2001 explorer also will work not sure if years are right

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Old 01-02-2010, 08:42 PM
fafa401 fafa401 is offline
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Quote:
Originally Posted by STL View Post
Replace this

2001-2010 ranger will work
1995-2001 explorer also will work not sure if years are right

thank you sir, now what is the common problem with these?
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Old 01-02-2010, 08:56 PM
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Quoted from rwenzing
You blower motor resistor block could be open circuited. The highest speed bypasses the resistors.

Unplug the 4 wire plug to the resistor block (under the HVAC blower motor in front of the pass side firewall). Then measure resistance across any two pins of the block, not the connector. There should be finite, measurable resistance between any pair of pins. Try several combination's. If the resistance on any or all combination's is maxed out on your highest analog scale or reads OL on a DVM, the resistor block has an open circuit or circuits and it's no good.

The blower can still work on the switch's highest speed because it bypasses the resistor block completely in that mode.

you should be able to find a range on your multimeter that gives a numerical value of the measured resistance other than close to zero or over scale (OL on a DVM).

This is just a final check you can make before you decide to purchase a new resistor block. it is a common failure on this part.

Look under the hood on the front of the firewall on the passenger side and find the plug in this picture:



You can get a resistor block assembly at a Ford dealer or parts house. $16~20 list.
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