What is this sound in my dash? I can't figure it out

[piccrazy30]

I've had this sound for about a week, its coming from behind the HU and sounds like boiling water and clicking. It does it for the first five minutes or so after starting the truck and exactly one minute after the truck is turned off. I have pulled everything out and looked over all the wires and connections, everything looks good but the sound is still there.

The video is looking into the space where the HU would be, which is where the sound is still coming from.

I installed the HU about 6 months ago and haven't had any problems with it besides a little feedback.

I can't stand to have rattles and weird noises going on. I really don't want to fry the electrical system either. Thank you for listening :kiss:

 

[Kmvreter]

It's probably a HVAC damper that is oscilllating due to the servo actuator. I have a similar sound but it's more random. There was a thread about this a while back. It's a pain to get at and not sure if there is a fix but one thing that was pointed out was to cycle the temp all the way from HI to LO in auto mode several times. It worked for me.

 

[piccrazy30]

It's probably a HVAC damper that is oscilllating due to the servo actuator. I have a similar sound but it's more random. There was a thread about this a while back. It's a pain to get at and not sure if there is a fix but one thing that was pointed out was to cycle the temp all the way from HI to LO in auto mode several times. It worked for me.

Is this the one your talking about?

http://www.toyota-4runner.org/4th-gen-t4rs/74575-4th-gen-rattle-click-boiling-sound-dash.html

 

[Kmvreter]

There was a thread more recent this year.

 

[piccrazy30]

There was a thread more recent this year.

What about this one?
http://www.toyota-4runner.org/4th-gen-t4rs/156776-replacing-re-circulation-actuator.html