Symptoms 1998
Important: The following steps must be completed before using the symptoms tables.
- Perform the
HVAC System Check
before using the Symptom Tables in order to verify that all of the following
are true:
| • | The control module(s) can communicate via the serial data link. |
- Review the system operation in order to familiarize yourself with
the system functions. Refer to the following:
| • | Heat Pump System Description
|
| • | Air Distribution Description
|
| • | Refrigeration System Description
|
| • | HVAC Air Delivery/Temperature Control Circuit
Description (1998)
|
| • | Blower Motor Description
|
| • | Blower Motor Resistor Description
|
| • | Heater Core Description
|
| • | Control Assembly Description
|
| • | Relay and Sensors Description
|
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for
obvious damage or conditions which could cause the symptom. |
| • | Inspect the replacement components for proper wire orientation.
This is especially important when replacing the reversing valve assembly. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose the symptom:
