I posted a question about my 2000 mazda mpv when I turn on the heat in the front it blows hot on passenger side but not on driver side in fron by steering wheel

a lot of vehicles have manuals online in pdf format

I assume this truck has daul zone heating and a/c, the air blows but is not hot? if this is the case then you may have dissconnected the blend door actuator or it just went bad. this is common that the actuator goes bad,
there are two seperate actuators that control the hot/cold door in the heater box this way the passenger and driver can set there on temp.
the actuator for the drivers side is locted on the drivers side under the dash on heater box, the blower is on the passenger side , you can check connections but i do not think it is that but rather the actuator.

your local parts store should have that info for you.

When I turn on the heat in my 2004 mazda mpv the front air vents blow heat but the rear air vents are blowing cold. I have adjusted every setting is there something I am overlooking.

3.0 V6

1-4-2-5-3-6The front bank is 6-5-4 from drivers side to passenger. The back bank is 3-2-1.

The drain hose empties on the passenger side, front, behind the front wheel and in a bit towards the center of the car. You need to run a long wire up it to clear it.

The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall.

The heater lines that run to the back of the right rear side gets rusty and start to leak anti-freeze. There is a black cover under and above the RR tire that has to be removed so u can see.

there is a tool (big, 4-sided allen wrench) w/ your jack, etc. Pull up small flap of rug behind front passenger seat (i.e., on floor in front of 2nd row, passenger side). Insert tool, turn and tire lowers to ground. Dan

The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall. This is for a 2004 Mazda MPV.