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 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