Initial Inspection and Diagnostic Overview

DIAGNOSTIC STARTING POINT - HEATING, VENTILATION AND AIR CONDITIONING

Begin the system diagnosis with the Symptoms - HVAC Systems - Manual. Symptom Related Diagnostic Procedures
Review the Description and Operation information to 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.

The HVAC Description and Operation information is divided into:
- Air Delivery Description and Operation in HVAC Systems-Manual
- Air Temperature Description and Operation in HVAC Systems-Manual

The Air Delivery Description and Operation contains the following topics:
- Air Speed
- Air Distribution

The Air Temperature Description and Operation contains the following topics:
- Heater Mode
- A/C Mode
- A/C Cycle