Odor Diagnosis. Chevrolet Impala 2001

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Impala 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Odor Diagnosis

Problem

Possible Cause

Correction

In certain climates and operating conditions a musty odor may develop. The odor is caused by a microbial growth in the evaporator core. This odor is generally temporary. As climate conditions change, the odor will disappear. If the odor persists it may become necessary to clean the evaporator core with an appropriate cleaner.

Musty Smell

•	Water leaks (body)

•	The evaporator drain is blocked.

•	There is mold or mildew on the evaporator core.

•	Locate and repair any water leaks. Refer to Generalized Testing in Waterleaks.

•	Clean the evaporator drain.

•	Clean the evaporator. Refer to Odor Correction .

Coolant Smell

•	The heater core is leaking.

•	The heater core hoses are leaking.

•	Replace the heater core. Refer to Heater Core Replacement .

•	Replace the heater hoses. Refer to Heater Hoses Replacement or Heater Hoses Replacement .

Refrigerant Oil Smell

The evaporator core is leaking.

Replace the evaporator core. Refer to Air Conditioning Evaporator Core Replacement .