Why is my air conditioner running when heat is selected on year 2000 mazda b3000.

Question edited to what I think you thought you were saying plus 'mazada' to Mazda.

No one has tried it with a Mazda, but a Ford Ranger 3.0 transmission will fit.

https://www.google.com/search?q=2000+Ford+Explorer+4.0+motor.+Will+a+transmission+out+of+Mazda+B3000+fit

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Tryhttps://big-manuals.com/products/2000-mazda-b3000-service-repair-manual , it's very helpful in repairing your vehicle

The answer is "NO"

Why would you even think that was possible ?

wiper motor has disconnected wire or is broken. If you go to your auto parts store and buy a Haynes Manual on your specific model and year, it will show you how to replace it.

It looks like the ac belt also runs the power steering on the 1.5 engine. Removing the belt would cause you to loose your power steering. You could still drive the car, but not without difficulty.

That means your engine is not heating up to working temperature or if it is the water hoses that go to the heat exchanger unit are clogged. Confirm that you engine coolant is heating up to working temperature. If not you might not have a thermostat in your cooling systrm. Insert one. If that does not solve the problem check water flow to air con.

I had a guy in the AC business tell me I had to bleed the air, change the dryer, and take out the compressor and fill it up with oil,, because I just put the compressor in my truck that hadn't had ac in years. So I said, what?? I just put the compressor in, i don't want to take it out, so I asked him again, he said the same thing, then I asked him again weeks later, it's getting hot out. He says, why don't you get one of the bottles from walmart, and fill it your self. I said, OK, $19, filled it up, with freon, oil and sealant, runs great! I had to give it another shot a week or so later, but it is holding and works great. So, instead of bleeding anything, get one of those bottles, and fill her up. Hope this helps.

This problem sounds like the aircompressor pully, the bearing is shot.
With the engine running and the air conditioner off there is a grinding noise, look at the compressor pully, does it wobble? Then turn on the air conditioner and the noise stops, look at the compressor pully again, the wobble stops? If so that's the problem.

The air conditioner compressor is driven via belt by the engine; if the engine is off, the compressor is off = no AC.

You didn't mention which fan is still running but I'll assume it is the one underthe hood, not the one that circulates passenger compartment air. 
What is running is the electric fan that assists with cooling of the heat exchanger of the AC system. You probably have a thermal switch or relay that is not releasing.


Locate the relay/fuse box and check if there is a chart of the relays and fuses to locate the one that isn't releasing and try swapping two relays with the same part number on them to check relay function.    

i need the diagram for a 1992 ford crown victoria fuse box under the steer wheel