Diagnostic Starting Point - HVAC System - Manual

Begin the system diagnosis with the HVAC Blower Controls Circuit Description, HVAC Air Delivery/Temperature Control Circuit Description (Pickup) or HVAC Compressor Controls Circuit Description.

HVAC Blower Controls Circuit Description
HVAC Air Delivery/Temperature Control Circuit Description
HVAC Compressor Controls Circuit Description

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. Symptom Related Diagnostic Procedures