Amy,
Possibly I can help you with the foul odor coming from the Climate Control air vents. Although you have desribed the odor as a vinegar smell, I strongly suspect it is just a result of mildew contamination within the A/C evaporator case.
This is an often heard complaint. It is more prevalant in humid areas or with vehicles that are stored for periods of time. The remedy is a fairly quick and inexpensive procedure using LYSOL Disinfectant Spray.
Step 1: Turn on the A/C system to HIGH FAN position, but only on the FRESH AIR INTAKE mode... DO NOT USE RECIRCULATION position.
Step 2: Have a helper release the Lysol spray DIRECTLY INTO THE COWL AIR INTAKE. Continue the spraying until the operator in the car can easily smell the Lysol odor coming from the vents in the car.
Step 3: SHUT OFF the A/C fan and/or system. The LYSOL should now be coated on all of the internal surfaces.
Step 4: LET THE LYSOL do its "magic" and eliminate all of the mildew spores and other contaminants, about 15-30 minutes.
Step 5: REPEAT PROCEURE at least one more time, or until you are satisfied with the result.
NOTE: If this doesn't solve the problem, unfortunately, it is likely that a dead creature is causing the odor, and that calls for a system dis-assembly.
HOPE THIS HELPS!
