- Symptoms - HVAC Systems - Manual

SYMPTOMS - HVAC SYSTEMS - MANUAL

IMPORTANT: Review the Air Delivery Description and Operation and the Air Temperature Description and Operation in order to familiarize yourself with the system functions.

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the system.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
- Inspect all related ground points for being clean and tight.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- HVAC Compressor Clutch Does Not Engage
- HVAC Compressor Clutch Does Not Disengage
- Blower Motor Always On
- Blower Motor Inoperative
- Blower Motor Malfunction
- Air Delivery Improper
- Air Recirculation Malfunction (Always in Recirculation Position) or Air Recirculation Malfunction (Always in Fresh Position) or Air Recirculation Malfunction (Inoperative) Refer to Symptoms - Cooling System in Cooling System for diagnosis of the electric cooling fan.

Refer to the following in Heating, Ventilation and Air Conditioning:
- Leak Testing
- Air Conditioning (A/C) System Performance Test
- TXV Air Conditioning (A/C) System Diagnosis (Insufficient Cooling) or TXV Air Conditioning (A/C) System Diagnosis (Reference Table)
- Heating Performance Diagnostic
- Defrosting Insufficient
- Noise Diagnosis - Blower Motor
- Noise Diagnosis - Air Conditioning (A/C) System
- Odor Diagnosis