Smell from heater

I have no clue where to post this but when I use my heat and change it defrost/feet or just feet area it has a really weird smell. Anyone have a clue why? 2012 double cab

 

Explain the smell?
Could be coolant, could be the smell of feet.
Does it smell like anti freeze?

 

Possibly a dead rodent? Whens the last time you cleaned your in cabin air filter?

 

it's been there since i got the truck so I just never turned it to the feet option or what ever. can't really explain the smell not like bad feet or anything. i just changed the in cabin air filter.

 

ill go see if i can figure out what it smells like and ill get back with you guys

 

AC compressor runs when on defrost to dry the air, could be mildew on the evaporator.

 

same deal with my 2012 DCLB. smell is worse with defrost or defrost/feet setting. filter changed. any luck getting this to go away deoxide?

 

I haven't figured anything out I have had people tell me it smells like vinegar tho. It's only on feet and defrost/feet. I have just avoided using those settings as much as possible.

 

Maybe it's your feet?

 

Previous owner have children? Spilled milk that spoils smells a bit like vinegar. Buddy couldn't sell a trade in cuz of spilled/spoiled milk. Removed everything in the cab, gave it a bath and most of it went away.

 

Inside the HVAC box there is a shallow depression at the base of the evaporator. Perfect place for condensation off the evaporator to collect and grow stinky stuff. A hose drains this space to the outside. Maybe outlet of hose plugged?

 

Same smell if I am not in the truck

 

Sorry for the revival, but I’m curious if any conclusion came from this! Same situation here, get a smell only when on defrost or foot setting with the heat on (not through head vents, not when A/C is on, and it’s worse at the low setting than with just def)

At first it almost smelled like a massive overuse of air freshener. Kinda spicy/floral/maybe a tiny bit sweet and a tiny hint of possible gasoline smell but not enough to say “yeah, that smells like gas”...

I’m stumped!