Nothing like jumping in the car in winter and your car blows cold air, or vice versa in the summer time where it blows hot. There is a pretty good chance that your blend door actuator is stuck in one of the above positions and that everything else with the system is just fine. In this video, I fix the blend door actuator in my Chevy Tahoe. This is a high dollar fix at the shop, so watch the video and learn how to do it yourself for under $50 bucks.
Alright, so jumped in the old Tahoe today and fired it up and it’s about 30 degrees outside so I fired up the heat and now it’s cold, it’s cold, cold, cold, cold. So, a thermostat is working, I had the car run a little bit earlier the thermostat is working it was getting up to operating temperature. This is checking the fuses inside. I got HVAC there and I’ve got heater HAC, right there. So, first thing I am going to do is check those two fuses.
Alright, here’s fuse number one, no issues there. 25, good shape. Okay, I’ll also just double check the fuse box under the hood. I did check both that 38 amp that 10 eight. Alright, so I also turn the engine on let it run for a good six or seven minutes, let the temps get up and both of my heater hoses that one and that one are both hot, equally hot so it looks like I got cold going to the heater core and coming away from the heater core. So, I’m going to keep investigating.
Alright, this is a 2002 taco and you can see that it’s not a dual climate control and the Blend Door actuator is underneath the glove compartment behind that big gray piece right here. So, a few bolts, maybe a couple bolts to get that thing off and we should get access to the actuator. Alright, the first few were really easy. The third one is here somewhere, there it is. Because of the close proximity between there and the carpet, the only thing I was able to get it with was a 7-millimeter universal and even then, it took a good 15 minutes so be patient on that third one. And with the big plastic piece out of the way, we can see what we’re going after which is this guy right here.
Okay, on the Blend Door actuator itself there’s two more. These are, I believe sixes and there equally is difficult to get to. I’m using this bendable guy right here and I’ll see if I can…. Alright, so I got one somewhere around here and the other guy is here, there he is, he is right there. Okay, so these guys are actually 5.5s and they are challenging. Alright so you can see in the mirror, you see the thing. I can put my finger in there, right there. It’s nice and hot. So, it was the Blend Door actuator. SO, the Blend Door actuator was the problem.
So, now take a closer look at this guy open him up and see why he doesn’t want to actuate and if I can’t get it to work I’ll buy a new one. Okay, so opening up the Blend Door we see this: motor, bunch of gears, circuit board, a bunch of slimy stuff.
So, what happens when I come up here? I’m going to turn that. It seems to be jamming up. After trying to diagnose the problem with this Blend Door actuator it just doesn’t seem to be working the way it should so I’m probably just going to fork out the 40 bucks or whatever it is to get a new one. So, I just keep them on heat so at least in my freezer while I’m driving.
So, I went out and got this at Napa. It’s lighter, seems to be cheaper made but the guy said he sells a lot of them and people don’t seem to be coming back for more.
Alright, so with that guy pointing at 9 o’clock over there and 3 o’clock over there I’ve moved my door right there to do the same, to be in the same position and I don’t know whether this matters or not but I put that in the middle position. So, we’ll try to get this on and then hope it works. There it is, ever so gently slide it up. Alright, we got both bolts in without too much issue and I hooked up the electrical and now I’m going to run through this procedure that I’ll put up on the screen here to try to re calibrate it. It’s already been sitting, I pulled the fuses out well over an hour ago maybe even longer and so now I’m gonna follow this procedure I put the fuses back in, turn the car on, not touch anything and I’m gonna follow these directions right here and see if that re calibrates it. Hopefully, it’ll work and I can move on to my next item on my list.
So, hopefully. Since it’s about the temperature turn it all the way to heat. That’s lukewarm right there. Okay, I’m start to feel some heat. Alright, yeah, that’s the heater, the heater is working. That’s the heater and that is coming out nice and hot. Now for the real test. It’s getting colder, fans get going, oh yeah, it’s cold. That’s cold. Alright, so that is “drive you out” cold right there.
Alright, I think our Blend Door actuator and we’re back in business and now I got to put the car back together again. Alright, after thoroughly testing it, making sure that works the only thing left to do is put this piece back in and it’s going to be a little bit hard with one hand so I recommend putting the camera doing and doing it with 2 hands.
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