Knocking noise under dash Volvo 780 2017

Your hot/ cold door Actuator is acting up , inside it is a gearbox usually when i open them up i see the two gears clashing causing that noise your hearing also causing your a/c not completely shutting off

 

Yes, take it to a Volvo dealership and have them fix it, it's still under warranty, isn't it?

 

I had the same issue. Passenger side dash constant clicking. I took it to volvo 2 weeks after I bought the truck and they inspected it and said it was normal.

After a couple more nights of losing my mind while trying to sleep, I took it back and demanded they replace it. They did, under warranty and no more noise.

 

Alex, I strongly suggest that you read that warranty so you know what is and is not covered! Most dealers will BS you with "oh, that isn't covered," or some other horse crap. Know what is covered, and you go in armed to deal with them.

 

I'd have to agree with big don. As far as I know, every manufacturer offers a 1 year comprehensive warranty.

Heck I brought mine in for warranty because a cupboard door hinge was loose!

 

It should have said clean idle mode active on the dash. I dealt with this with my new one and volvo was useless in answering this question. You would think they know their own truck.......

Think of it as adaptive idle. The engine is smart. It is mostly for the cali clean idle that it does this....

If it's cold outside and your engine is starting to produce too much emissions and needs to warm up to keep the emission system running at peak efficiency, it will adjust the idle accordingly. It knows if it needs to be hotter or colder and will adjust the rpm on its own.