Question about 1994 Oldsmobile Silhouette

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A/c was working on high then stopped and would only work on medium and now it wont work at all. what would cause that problems

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A bad climate control relay will make it just run on high but i never seen on go from just working on high to just working on medium. Check the fuse and relay first then check into the control panel.

Posted on Aug 19, 2010

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Posted on Jan 02, 2017

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What causes heater blower to barely work on high? wont work at all on low


A couple of possibilities; air path blocked by debris (mouse nest, etc.), the sleeve-type phosphor-bronze fan bearings are clogged with wear particles, less likely but still possible is a failing blower switch, failing ground for the fan motor or an oxidized fuse or fuse holder.

A multimeter would be handy to isolate the source of the problem.

With your headlights on and shining on a vertical flat surface, try noticing if they dim very briefly when you quickly turn the blower on.
If not, then the fan isn't getting full current, if they do, then this would indicate a bearing problem with the fan.
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1 Answer

1992 chevy C1500: Heat works on low speed, no medium, and high only works intermittantly.


On any other vehicle it sounds like the blower fan switch.
The fan switch provides power or ground to the resistor and there would be a high speed blower relay to bypass the resistor.
But in your case the fan switch is part of the controller.
I don't have a diagram for a 92 but the 94 model shows relays for low medium and high speeds. Each relay gets power from a fuseable link. The high relay gets power thru the low relay if the low relay is not engaged.
If you have the model with 3 relays you may need to check them.

Feb 01, 2013 | 1992 Chevrolet C1500

1 Answer

Wiper motor wont work on the slow or medium settings but it kind of works on high


All eletrical switches when fail goes to fail safe mode and that is high, so I assume you need a new wiper switch.

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Only off and high works on a/c


Try replacing the blower resisto block usually the cause of this type of problem

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Why does blower fan speed switch lock-out off and low speed positions on 1998 chevy silverado? It stopped working altogether then I replaced a 10 amp fuse and now only medium high and high will work but,...


Sounds like you may have a bad blower motor resistor.  When they go bad, they usually wipe out all speeds except high.  But could knock out just one or two of the speeds.  It should be located near the blower motor.

Sep 10, 2009 | 1998 Chevrolet K1500

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Replacing the wiper control unit on a 1999 honda accord


yes it will get worse-yes they can stop working all together-you must replace the arm on which the switch is attached connected to steering column- get a used one from junk yard and a book at library

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