Question about Mazda B4000

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The AC seems to stay on when the control knob is turned to the off postion on my 2001 B 4000 with 72,000 miles.

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The compressor clutch relay many be stuck on.

Posted on Oct 23, 2008

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I have a '05 Silverado 4wd 4.8L heater problem


my dad had the same problem in his 95 ford ranger it ended up being the control module that selected heating and colling and what vent postion the steper motor should select
you can buypass the module under the hood so it isnt kicking in the ac when you want heat
but ultimatly have the dealer fix it since its a factory defect :) cheers hope this helped

Feb 24, 2010 | 2005 Chevrolet Silverado

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Heater/ac control knob fell off, how to put it back on?


When I worked at the dealership I seen alot of these knobs crack and break and the metal retainer stay on the control shaft,you have to remove retainer and either puchase a new knobat the dealership or glue the retainer back in the knob.

Sep 26, 2009 | 1995 Chevrolet Monte Carlo

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I have a 2003 dodge ram 1500, my AC works great but only blowing out in front. Seems the knob to control vent does not work as I turn it and get no results it just stays blowing out the front. same when I...


The knob has vacuum hose that is attached to an acutator that moves the flap inside the venting controlling the direction of the air flow. The vent can get stuck, or the acutator can become leaky and faulty.

Sep 09, 2009 | 2004 Dodge Ram 1500

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My sunroof will not close and stay closed. When the knob is in off postion it goes to close and reopens itself. It seems that the knob/motor is confused and thinks its always on open. How do I fix this?


I also have a 2003 GTI, and my sunroof recently started doing the exact same thing! Wish I could help you. I found your post while trying to find some info about this problem online. If I find anything, I'll post a link for you here. Good luck!

Aug 02, 2009 | 2003 Volkswagen GTI

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Ford F150 2003 When I press the max cool on the AC the air comes out of the windshield defrost vent iinstead of the cabin vents and is not as cold as it use to be. Summer in Texas Help !


You did not mention if the system you have is electronic(digital control) or manual(control knobs) but what your problem is, is a vacuum leak. Defrost and heat or the default postions for no vacuum. If it works ok until you press max air Then you will need to check the outside blend door vacuum motor. It will be the white vacuum line going from the control head.
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Jun 01, 2009 | 2004 Ford F150

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Heater Fan does not work


Sounds like the fan control knob has shorted out. You can check the fan "blower" relay and fuse in the engine compartment but you need to make sure the control knob is good or you will keep blowing fuses and relays. If your blower fuse and relay are good, then just have the control knob checked and replaced if needed.

May 08, 2009 | 1999 Volkswagen Passat

1 Answer

Green light on dashboard stays lite. looks like a little fan.


What does the green light say? Turn the key to the on postion without starting the engine, read what the light says.

Apr 28, 2009 | 2001 Mercury Sable

1 Answer

No back light in the dashboard


No No. Just a burnt light bulb. You can replace it very easily. The knob on the controls can be pulled of. Use a rag or cloth to protect the knob then pull it out with pliers. Inside the little hole use a small piece of hose that fits over it and the bulb straight out. Just reconize the position of the bulb when you pull it out to align the new on correctly. Using the same pice of hose reinstall it. Then turn on the lights. The bulb will heat up the hose making it expand a little and using a little thin screwdriver or pin hold the bulb in place through the tube and pull off the tube. Then with your finger just make sure the bulb hasn't moved. Reinstall the knob in the same postion (only goes one way) and try the knob and the lights. Everything should work great. The bulb from VW is less than 10$, and is an easy do it yourself. You DO NOT have to remove the heater console to do this.

Nov 28, 2008 | 2005 Volkswagen Jetta

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Cold Am . I turned the left knob 45 degree . All i get is HEAT,knob moves


Hi rafis1234,
if you are handy, you can remove the small dash panel where the a/c control knobs are and then you'll access the lever mechanism and most of the time you'll find a rusty lever or someting has jammed the lever.
Cheers

Oct 28, 2008 | 2004 Nissan Sentra

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