Odor when using heated seats - 2007 Volkswagen New Beetle Coupe

Check for battery power on the orange wire pin D and ground (black wire) pin C- Brown wire pin B should be ignition hot on connector C1 on the Driver Climate Control Seat Module located under the driver seat. If you have power and ground, you may need to use a scan tool to see if there are any codes stored in the module. If the scan tool is unable to communicate with this module, it could either be a bad module or a network problem. If you are missing either battery, ignition hot, or ground- then repair as needed

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post again with a lot more details

Go to your local pet store and get something called nature's miracle. It is the bomb with odor and stains. good luck smell you later! lol

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jeff_24365d731679262d

sounds like a mouse nest in hvac system, no smell because when using ac it doesn't use outside air, probably a nest on the screen at the hvac air intake or if you have a a cabin air filter check in there. many times rodents make nests have babies and then the car moves and they cannot feed the babies and so they die and rot smell comes into car. usually it is not hard to access because there should be a screen between the outside and inside under the cowl cover, if no screen and the little buggers vot into your hvac duct system this could be a much bigger problem entailing removal of dash completely. most likely this isn't the case, good luck

I would guess so because there should not be an odor coming from your vents and if it is worse when the heat is on there's a chance something literally crawled up there and died! I always wanted to say that not referring to peoples butts. lol But all kidding aside. You would be surprised at the little critters that can find there way into your venting system. Or just organic material that has gotten in there somehow and decayed. Best of luck tracking down those oderiferous emanations.

good question,
i hand one really bad seat, (milk spelt by PO)
i even remove the cushion and cover. ran cover thru washer mach.
and the seat i put in a huge tube outside,
i soaked it in TIDE. hot water.
then when done , rinse
i used that chem called, dog/cat pee enzyme remover.
this attacks the proteins in the milk.

but really ,it does matter the cause of odors, infinite.
and the solution (no pun)
also barcarb soad soaks.
lye always works but kills plastic.

my last rinse was with PineSol (pine oil)
then let it bake dry on the roof of home, in hot summer sun.
i solved mine, but took hard work,
but was paid back on resale, no funny nose sniffs, by buyers.
sold car for more than paid , after 6 years. (mx5)

there are several types of sprays to clean interriors. one is for carpets and fabric other type is for plastic other is for leather or vynil.

first of all you need to clean interriors by sweeping it with vacuum cleaner and with water and natural soap. do not use lots of water since you will need to dry it later.

after cleaning interrior you need to proper liquid to clean related surface and wiping it with a soft quality cloth.

in general fabric surfaces like top lining and seats and carpets require two pcs of sprays(multi purpose interrior cleaner). if you seats are leather covered you need leather contidioneer. after cleaning fabric and leather. use plastic cleaner in pressureized spray cans. after wiping off all left cleaning agents, clean windows with only alcohol with a microfiber cloth.

this will take normally 1 to 2 hours. use gloves.

ballast resistor burnt out

Sounds like a possible heater core failure(hole in it) the smell indicates to me the coolant(anti-freeze) is leaking into the passenger compartment.
Check the carpet in front of the front passenger seat for moisture, this would confirm heater core leak.
Good luck !

Did you check for any gas leaks ? Check for gas leaks all over the engine. This is not supposed to happen. There is no way that the gas could get into the cooling system. The odor has to be coming from a leak or maybe the carburator (if equipped) flooded. If the odor goes away. , it may have just been too much gas to the fuel system.