I just got my truck back from my mechanic ( I took it in cause the truck seemed to take some time to cool down) and he told me that one of my blend doors was broken (the lowest one). I seem to get plenty of air for my feet on both sides. But I did notice that I get almost no air for the rear passengers in my mega cab. I do have some air leakage from the bottom vent when I have all air blowing in my face and or on defrost. I've gone to the heatertreater web site and I'm not sure what I should order. Should I step-up to door number 3 and order all the doors or step-up to door 4 and order all those doors? Any help would be greatly appreciated.

 

I ordered all the doors cause you get a little discount for buying them all...
I have only installed the recirc door (only one that has broken so far) but have the others on-hand for the day...

 

You will only want to that job ONE TIME!!!! If you are going to have it apart to fix one door, you might as well save yourself the anger of having to do it again and replace all of them because sooner or later the will fail.

 

I guess I didn't ask the second part of my question correctly. On the HeaterTreater web site I'm not sure if I should buy Option 3 $231.92 is on bottom left side (all the doors) or Option 4 $241.92 is on bottom right side (all the doors) two different prices.

 

Call heater treater, they would be the best source and can tell you the difference based on your specific issue.