Question about 1992 Chevrolet C1500

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92 chevy c1500 heater control panel only works fan on high no med.or low??

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Posted on Jan 02, 2017

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SOURCE: Heater only work on high

Most likely is the resistor when they fault the default to high giving you off and high only

Posted on Dec 06, 2008

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SOURCE: a/c heater climat control switch

Check the relais module located inside under the rh side of the heather box you can see the connector most of them need to be replaced as they burn out you may need to replace the blower motor as well,high amp draw caused by faulty bearings will overload the blower motor controller

Posted on Feb 15, 2009

  • 75 Answers

SOURCE: 1993 Chevy Silverado truck headlights high beam only works no low

dimmer switch has gone bad need to change your dimmerswitch

Posted on Apr 01, 2009

  • 82 Answers

SOURCE: Need a diagram for a

the low side should have a blue cap on the service port and the high should have a red cap, also the high side port is larger than the low side. hope this helps

Posted on May 05, 2009

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SOURCE: 1997 Chevy S10 pickup Fan switch for heater runs on high only.

replace the blower motor resistor located on the heater box were the blower motor is located the wiring to the blower may go to it. This is very easy to locate if you buy the part first.

Posted on Jan 06, 2010

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1 Answer

The heater fan only works on high


Item that need to replace is the blower resistor.

It is on the firewall side.

Jan 11, 2014 | 2001 Chevrolet Astro

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

Blower Controls No Low or Med Just High Speed


problem could be in blower motor resistor or blower motor control switch is bad.

Jun 03, 2010 | 1996 Chevrolet C1500

1 Answer

Why does my heater in my 2000 ford ranger only work on the high setting?


I assume that you are talking about the heater fan?

Your heater FAN has at least 3 settings, and for our purposes we will assume low,med and high

Low and medium run through a resistor High is wired direct
Either your resistor is bad or your fan is
I know it seems wrong that the fan could be shot but it could be pulling so many amps that it won't work in any other mode than high
I just had this happen on one of my trucks
Start with the fan

Apr 06, 2010 | 1998 Ford Ranger SuperCab

1 Answer

My heater won't blow out any air unless it is on high with the fan blowing.


Hello let me verify.
1 heater wont blow out warm air unless on high?
possible clogged airfilter.low on coolant or antifreeze.

2 heater wont blow any air unless on high?
Could be a bad switch low ane med do not work.

Jan 14, 2010 | 2005 Jeep Grand Cherokee

1 Answer

2004 chevy heater fan works on low and medium speed but not on high speed


There are two relays for the heater control fan,a low blower relay and a high blower relay.It sounds like the hi blower relay is bad.

Dec 12, 2009 | 2001 GMC Jimmy

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