Question about 1998 GMC Safari

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Blower fan works changes speed but not getting powerful enough blowing

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  • Anonymous Jan 22, 2009

    anti-lock lights on

  • michael sinclair
    michael sinclair May 11, 2010

    does your safari have air and is it working? mike

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  • 51 Answers

Check and see if air is coming out at floor, defrost, and dash at the same time and if so you have a bad vaccum leak for the controller that determines where the air will come out at. If this only restricted when a/c is on the the problem is a dirty condensing coil.

Posted on Jan 09, 2009

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How to trouble shoot front blower


There are several reasons for a blower to stop working. Does it work on ANY speed? Does the AC compressor lamp or any of the vent control LEDs still work when using the AC controls? Do ANY of the speed for the blower work or are they all dead?

1st, you wanna check your fuses. There will be fuses in the underhood fusebox marked blower or heater fan, check and repalce as necessary. Also, if the earlier check for working LED bulbs on the AC control panel showed some or all lights dont ever turn on when engine is running, you may have problems with the control system.
if the fuses are good, now you need to test parts. there is a blower motor speed control aka blower resistor that frequently fails on most cars. It is the part that carries the current for all speeds of the blower and regulates speed when commanded. It has to absorb the excess energy to lower speeds and it tends to get very hot and burn out as a result. If it has failed, there will be power IN on one of its wires, and no power OUT on any others. If you have no multimeter or testlight to check things like this, Id recommend taking it to a certified mechanic.
If the control lamps all work that means controls have power, if the blower resistor has no power, fuses or blower relay are the most likely cause. if the blower resistor has power but still no fan, most likely your fan has failed. as a general rule, I replace fans and blower resistors as pairs. fans tend to last longer, but they also get more demanding with age (kinda like people) and that extra demand will burn out the newer resistor much faster than when the fan was newer. it can be alot of time and money to change a blower TWICE, so to be sure it wont fail again, test current, or simply replace the blower fan if it is determined a resistor has failed. (a good fan in theory shouldnt draw enough amperage to burn out a good resistor, EVER, so if the resistor burns, the fan is typically drawing too much power, and even though it works "fine", it will burn the next resistor in a short time as well.).

Feb 24, 2015 | 2005 Dodge Caravan

1 Answer

Fan speed wont change speeds on heat or cold cycles


Sounds like the Blower Motor Resistor. The range from 10 to 75 dollars depending on what kind of vehicle. Pretty easy to change.
Blower Motor Resistor Repair Heater Fan Speed Control Chevy Blazer GMC...

Nov 09, 2014 | Cars & Trucks

1 Answer

Sentra AC


There's a 10amp fuse that powers the ac clutch relay and compressor. There are 15amp fuses that power the blower motor and the ac control switch. All of those fuses get power from the key switch. The resistor and fan switch provide the ground circuit for the blower motor.
I would want to know if those fuses are getting power, and if the control panel is working. You should be able to ground the blower motor and make it run on high, and that should not have any effect on if the ac compressor is running or not.
It could be a key switch problem in that the circuit is not strong enough to handle the load from the blower and the compressor at the same time.

Jun 21, 2013 | Cars & Trucks

2 Answers

Heater blower went out


Normally when the blower motor goes out it has trouble a few days before and cuts in and out so I would check fuses first but I may be wrong and if the fuses are fine the I would change the motor

Jan 22, 2013 | 2001 Honda Passport

1 Answer

When i turn on the ac no air blows throw


Go to the fuse block and check 15A fuse D which feeds power to the blower motor. Then check 10A fuse K which feeds power to the blower relay and the fan (blower) speed select relays. If the fuses check OK, the blower relay, the fan switch or the speed control relays may be defective. also, the fan speed resistor may be defective

Oct 17, 2012 | 1993 Nissan Pathfinder

2 Answers

Ac fan doesn't blow hard enough 1985 300zx


If very little air comes from the vents, the fan on the blower motor may be damaged, or there may be a restriction in the vents, or a blend door may not be open completely.

Aug 23, 2012 | 1985 Nissan 300ZX

1 Answer

A/c only works on low blower speed


Not a VW expert here - but does the fan still blow on higher speeds ?
My first guess would be the fan switch or the resistor.
On most cars the compressor will run with or without the blower, but VW cars may get compressor power from the blower resistor.

Jul 04, 2012 | 1997 Volkswagen Jetta

1 Answer

A/c is cold but the fan is not working to blow it into the car stopped working on high first now will not blow at all


Check your blower motor resistor. It is commonly the part that the blower motor power connector plugs into. It sounds like the high speed element went first and you lost the high fan speed. If the remaining resistor element is broken, the fan will stop working. The resistor only have 2 elements; if they're both broken, it creates an open circuit to the blower.

Jun 24, 2011 | 1996 Mercury Mystique

1 Answer

Blower Motor Speed - It was suggested


BJ
I'm using the comment section of the original posting to communicate with you.
Pat

Feb 25, 2010 | 1999 Jeep Wrangler

1 Answer

I have a 1995 tracker with an aftermartket a/c added several year ago. I started having a problem with the fan blower, it would only blow at the lowest speed. A/C and low speed still worked , just no...


Sometimes aftermarket systems will have an in line fuse. If that's not it, look around on the blower box, for some wires going to a connector that is held to the blower box with a couple of screws. It's the blower motor resistor. It could be that or the switch.

Aug 15, 2009 | Geo Tracker Cars & Trucks

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