Symptom Action
Does not make sleeper
colder
OR
Does not maintain sleeper
air temperature
Turn off the unit.
Turn the vehicle ON and use the vehi-
cle’s main air conditioner to cool the
cab and sleeper.
Close the sleeper air curtain.
Turn the vehicle off once the air tem-
perature is colder than what is
desired.
Turn the unit back on.
Does not operate
OR
Does not turn on
Make sure the vehicle is OFF and the
ignition is NOT in the ON position.
If the SERVICE icon turns illuminates
briefly, have an authorized dealership
service the system.
Verify condition of the fuses. Have an
authorized dealership service the
system if blown fuses are found.
Verify the condition of the starting
and auxiliary batteries.
Does not blow cold air.
OR
Airflow is less than normal
Check the air filter for dirt and debris.
Check the unit for any items blocking
the air intake/supply.
–10– Y53-6051-1C1
Symptom Action
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