Diagnostic Starting Point - Heating, Ventilation and Air Conditioning

Begin the system diagnosis by reviewing the Air Delivery Description and Operation and the Air Temperature Description and Operation in HVAC Systems - Manual. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - HVAC Systems - Manual in HVAC Systems - Manual in order to identify the correct procedure for diagnosing the system and where the procedure is located.