I have 2015 evo x 32k miles on it
Today I was installing an aftermarket radio.
After I got done, I started the car and turned on the ac/heat and I heard a loud clicking noise. I turned it off checked everywhere couldn’t find anything.Turned it back on and turned the ac. The Ac is cold and working. Turned on the heat, No heat and burning smell. Is it possibly that one of the stupid clips fell down the vent and it making something stuck like a heater fan or something?? How can I check? Where can I get access to check? Any ideas or recommendations will be appreciated.

thank you

 

The heater fan and AC fan are the same. There is a blend door that changes where the air is flowing so maybe it's jammed from an object dropped in? You can tear everything apart but I'd suggest grabbing a cheap USB endoscope from Amazon or wherever and running it down the vents to check.

 

that’s a great idea. The blend door changing for air flow make sense, but why you think there is a burning smell ? If the door jammed that you mentioned it can cause a burning smell because it’s trying to open and it can’t ? And that clicking noise at the beginning should I be concerned ?

 

so I looked inside the vents there is no way the clip fell inside because it goes up where I circled in red is where the clips fell behind there I looked everywhere in the back both sides and I couldn’t even find the clips in the back anywhere . So where did they go? And why would it make that clicking noise twice ?. And had like burning smell?? I even looked inside the vents even when ac is on and like I didn’t see any opening and such

where is that damper door?

 

Hard to say where the burning is coming from. Could be something dropped down on the heater core or if it's jammed the solenoid motor burned out. The clicking cloud be the blend door gears skipping if the door is jammed. Really hard to guess at.

 

it fell behind where those red circles . I looked everywhere with a scope couldn’t even find the damn clips. Where are those blend doors located behind there so i can look and see if it’s blocking it
I checked inside the actual vent and I couldn’t see anything in there but the vent kinda go up like in the pic so there is no way the clip went up and then fill down the vent if that make sense

 

Update , I started the car today and turned on the heat and it worked fine without any burning smell and didn’t heat any noise maybe like you said it probably got melted by the heater core and such but everything seem to work fine. Thank you for your help