New noise from a new place...WTF is it?

[DenaliAK]

Ok, I'll see if I can describe this.

In the back of my truck, directly opposite of where the jack is, there's a "hollow" area in the plastic on the passenger side. it looks like it might have a speaker in it, but other than that it just seems like space. it's just in front of the rear power port. If I bonk the plastic, there is no resistance and it just sounds hollow, so I always assumed there was nothing there, like a reserved space for a subwoofer or something.

Anyway. There's SOMETHING in there. It makes a repetitive noise that almost sounds like a duck quietly quacking. I can't figure out what the hell it could be. I thought maybe it was part of the ventilation system back there, so I shut everything off and it kept doing it. It sounds like a weak motor trying to drive something over and over. Very bizarre.

Anyone got any ideas on what is in there?

 

[WHITEOUT]

that I am aware of, it is where the rear A/C components are. Don't hold me to it, but pretty sure I remember there being A/C components inside there when I had my accident and they had to pull rear panel. Guessing it's the A/C stuff you are hearing.

I know the driver side usually holds a speaker

 

[ScottL4619]

Do you have rear heat/AC? There are blend door actuators in there that can go bad and make a racket. Some sound like a constant ticking, some knock, and apparently, some quack. There is one door to control upper/lower and one to control the temperature (if you have rear heat). If you just have rear AC, I don't think there are any actuators.

See if your rear heat blows cold when set to hot or vice versa. Also check to see if it blows out of the top vents when set to floor (or vice versa).

 

[soulsea]

Could it be an actual duck?

That's all I got.

 

[07Burb]

OP, did you possibly just get Aflac?

 

[Rivieraracing]

Instead of a trunk monkey, Scott has a truck duck!! hahaha

JK, my guess is that it's either the actuators like mentioned or also the fan itself for the rear air!

 

[soulsea]

Instead of a trunk monkey, Scott has a truck duck!! hahaha

Truckducken?

 

[DenaliAK]

Could it be an actual duck?

That's all I got.

OP, did you possibly just get Aflac?

Instead of a trunk monkey, Scott has a truck duck!! hahaha

JK, my guess is that it's either the actuators like mentioned or also the fan itself for the rear air!

Truckducken?

LMAO

You guys are super helpful....lol. I'll check for an actual duck just to make sure.

I need to spend some time tearing it apart and see what's actually going on in there. I have rear heat and A/C, so if that's where it's located I'm sure that's the culprit.

Thanks for the laugh, guys. Been a rough day so far, so that was good timing.

---------- Post added at 02:43 PM ---------- Previous post was at 01:45 PM ----------

Only getting hot air in back. Now what?

 

[07Burb]

If it was me (I don't know anything about AC repair) I'd take it to a shop and get your rear AC compressor checked out by a shop.

 

[soulsea]

If it was me (I don't know anything about AC repair) I'd take it to a shop and get your rear AC compressor checked out by a shop.

That's what I'd do ... I'd also get some Peking sauce just in case.

 

[chauncey0337]

That's what I'd do ... I'd also get some Peking sauce just in case.

LOL. Thanks for the laugh Serge.

Scott, sounds like your hot/cold blend door actuator is bad or gears are stripped. Open the compartment up and locate actuators and figure out which one is hot/cold actuator by changing a/c modes. This is the one you need to replace.

 

[DenaliAK]

I can't afford a mechanic right now. Peking Sauce I can do, though.

It's blowing hot even when I turn it down. I don't expect cold air, but it should definitely be cooler than when it's turned all the way up. Is there a thermostat back there that might be toast?

 

[chauncey0337]

No thermostat back there but there is a heater core back there.

 

[07Burb]

Does the front blow cold?

 

[ScottL4619]

If it is blowing hot and then you turn it to cold and it doesn't blow at least luke warm (if the AC compressor isn't on), I would bet it is the rear blend door actuator. I don't believe it is hard to replace on the rear unit. I have not done it, but have seen threads floating around here with people that have.

 

[Rivieraracing]

It's gotta be your blend door back there like Chauncey said since you only have heat coming out of the vents!! The blend door should be the one closest to the back of the truck, right next to the rear heater core!!

And be sure to feed your truck duck while you are back there, when they get super hungry they are known for attacking their owners out of spite!! lol

 

[Rivieraracing]

Here are a couple pics of when I inspected my setup a while back, if you only have heat and no cooling, then it's gonna be the blend door one I marked in the first pic!

 

[DenaliAK]

Sweet. Thanks everyone. And thanks for the pics, Chris. I'm hoping to get at it tomorrow for a closer inspection. Course, I hoped I'd get to that today as well and it didn't even come close to happening....lol. I hope that's all it is. That sounds like a minor thing I can do myself.

And yes, the front does have cold air. A/C appears to work up there.

 

[fire730]

If it was me (I don't know anything about AC repair) I'd take it to a shop and get your rear AC compressor checked out by a shop.

No truer words have ever been spoken. Lol

Definitely sounds like a blend door actuator. If you dont want to spend the money on a new actuator just pull it out and jam it so the door stays in the cold position for the time being.

 

[DenaliAK]

Anyone have a part number or link handy? I want to make sure I get the right thing.

NM. I got smart and pulled it from the pictures Chris posted....I can get it for about $50. If I can install it myself, that's not bad. Also probably means local price is about double that. Gotta love the internet for car parts.