Peterbilt 579 defroster no air fix.(HVAC system, blend door and actuator troubleshooting & repair)

The defroster vents were not working. I removed the whole dash in this video. The HVAC system, the doors and the actuators are clearly visible in this videos. The panel door was the problem. It was broken, so i replaced it.

[@artillman4557]

I would like to take a moment to THANK YOU for this video....you spent a lot of extra time stopping to take clips and explain in enough detail, including IMPORTANT little things like the fact the plastic panels have to come off in a certain order or you will break them..... this, for me, is the difference between a helpful video and utter frustration!! I guarantee you saved me at several hundred dollars in broken parts, and I feel confident in doing the exact same repair on my "16 579. your pride in your truck is clearly shown, and you should be proud of that, as so many in this industry do not have that sense of ownership, and their trucks reflect that Again, thank you so much!! Art Illman, owner Greenwood Transport Specialists Calgary, AB, Canada

[@djfazher]

It’s 2021. My 2016 Peterbilt stopped heating. It turned out the cold/hot blender door Actuator had a loose mounting screw. I got access to it by simply removing the two dashboard plastic covers, behind the air brake valves. I tightened it with a T20 Torx wrench and it started working again. I learned a lot from your video. I hope someone finds my experience helpful.

[@kimpaulk5221]

About to try the same thing. I hope it's as simple for me.

[@user-qy7hk2qh9h]

Best you tube video ive seen yet on not over explaining and getting str8 to the point

[@theranchford]

Hey thank you so much for this video, just got out truck back from a shop I had never been to before and got the bill for $1,800 labor, and about had to sit down to write the check. 😵 So feeling much better now after watching your video! Thank you, thank you, thank you! Blessing!

[@davee62]

Awesome video helped me to find exact same problem as yours with same issue with broken panel. Everything still apart and ordering parts. Makes me think this is a PACCAR design flaw and waiting to happen with every truck. Yes it was stressful but glad I did it. Thankyou

[@bobbycox81]

Thank you sir, I can’t thank you enough!! I took mine apart and I have the same issue. Hope they stock the door here in Vegas!

[@ali-tr9tp]

really smart guy and courageous to do it by your self

[@moonrunnerlife1640]

Really wanted to see you open it up! Great video helped alot!

[@DanielGarcia-zz9eg]

Damn!!!!!!! Good you saved thousands. Thats too much for me to handle. Great job

[@stevenpetersheim6580]

Thanks for sharing this... Great video...Helped me have the confidence to replace my broken blend door and actuators

[@Geoffwhite18]

Thanks for the video. My truck started doing the same thing. Argggggg.

[@christopherwright4196]

I just replaced the blend door actuator for the 2nd time in less than a year on my 2016 Pete 567. The problem I'm facing now is when I set the climate control to anything less than 84° I get ice cold air, when it's on 84° I get full hot air there's nothing in-between I'm trying to figure out where to start troubleshooting the issue after watching your video I'm thinking I need to get my hand in there and physically check the blend door. I've had a tech tell me there's also an update to the cab controller for this issue as well

[@nazarbrichka3984]

Great job!! Thank you for posting this video.

[@jamesmackinlay4477]

I tell you Peter built quality has really went down the tubes seems like all 579s are having all kinds of problems. And to make matters worse you have to tear basically the whole dash out to to change a few little things that should last at least a few years.

[@caseydale4731]

Good work. Looks like a few hours just to get to it.

[@Trucker23697]

Nice I have some problem with 2015 Kenworth T680

[@artashesed]

Thanks for the video thats very helpful, do you have any chance vent door part number?

[@LoadedSawedOff90]

Did you have to reprogram the motor once you put it back together?

[@jboskwick]

Thanks for sharing that very helpful!

[@Papakev636]

Have the exact same problem. I appreciate the work you put in. And thank you for sharing. I think I will sit down and do the work myself as well. My question is do you have part never for the vent door you replaced? My pin is also broken at the actuator. So I will be replacing the same part.

[@ali-tr9tp]

big job man😮

[@davindersinghdhillon3742]

Hi i need little help , i just bought a truck it has miising blend door for heat or cooling change

[@douglastorres3781]

Thank you so much for the video got the same problem

[@ericdefigueiredo4238]

Hello there buddy

[@JesusDiaz-ju7hw]

Hello my brother can you let me know how you replaced the door

[@adamjones6486]

what was the part number for the door? my pete dealer wants to sell me the whole air box for $1600

[@martinsandoval5291]

Good video thanks But there can I buy the door?

[@diyrepair1788]

From dealership

[@lathanhowe5531]

Do you have the part number for that blend door you replaced?

[@user-dv4ji9iu8h]

I have a 2021 Peterbilt 389 there is no air coming out of the dashboard vents

[@juanbvasquez5971]

Good Job

[@romchik2500]

Anybody knows the part number of that door? Mine broke exactly like yours. It must be design flaw.

[@Papakev636]

Seems we are all having the same problem 😂

[@romchik2500]

I found the part number for my truck: panel door part# F31-1170-06 I have 2015 Peterbilt 579

[@Papakev636]

Thank you.

[@martinsandoval5291]

The part # F31-1170-06.. Mine it's 2016 pet 579. I went to Peterbilt and they said you have to buy the whole thing for 1,500 because you can't find the door by self. Them I removed the door out of my truck and went to Kenworth They have it for 37 dollars so now my defroster it's working just fine..it took me like 7 hrs to do the job ..

[@kevinpcely]

@martin sandoval... usted sabe el número de parte... my friend you hace the part number...?

[@faizanahmad916]

Can you also show us the if it’s the fuse or where is the fuse location. Please Thanks

[@ali-tr9tp]

my peterbil vent doesn't blow up air unless i click the outer air gate then it blows air normally.

[@harvinderghotra]

Can tell me when I turn on heat my truck acc work no hot air

[@rolandorodriguez906]

I got ac working Blowing cold air but it doesn't blow heat have any idea what is goin on

[@kirandeepkaur2613]

👍👍👍

[@ivansarinana8411]

Whats the part # for that vent door and actualator ?

[@faizanahmad916]

I want to check the fuse before I took it apart.

[@Andysidhu88]

Do you have the part number for this blend door?

[@baldevkaler5002]

And please may help me out to this problem

[@jodyroe7996]

part number for defrost door please?

[@juanrangel7123]

Do you have a part number?

[@chris76-01]

Lakeside plastic cone

[@juanbvasquez5971]

👍👍👍👍👍👍

[@eliceodiaz2492]

anybody know where the blend door actuator location on a 587 pete ?

[@peterkimemiah]

Hello, did you figure out where is blend door actuator located?

[@sametsafca]

Hi there, I am having same problem and trying to reach you. Is there any contact information?

[@martinsandoval5291]

Part # F31-1170-06 My truck it's a pet 579 But I get that blend door from Kenworth dealer..

[@weaversbustedknucklegarage7696]

Just so I'm clear, Kenworth sells just the Door and not the whole assembly like Peterbilt? What's the part # for just the door?

[@kevinpcely]

I'm in Kenworth and they said I need to buy all part

[@davee62]

Awesome video helped me to find exact same problem as yours with same issue with broken panel. Everything still apart and ordering parts. Makes me think this is a PACCAR design flaw and waiting to happen with every truck. Yes it was stressful but glad I did it. Thankyou