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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

Symptom Diagnostic procedure Also check for
Recirculation control doors do not change between Fresh and Recirculate Recirculation control motor circuit troubleshooting (see RECIRCULATION CONTROL MOTOR CIRCUIT TROUBLESHOOTING  )
The blower motor does not run immediately even though the engine is fully warmed up
NOTE: The temperature control dial must be set between 58 °F (18 °C) and 86 °F (32 °C)
ECT sensor circuit troubleshooting (see ECT SENSOR CIRCUIT TROUBLESHOOTING  )		 Cleanliness and tightness of all connectors
Blower, heater controls, and A/C do not work Climate control power and ground circuit troubleshooting (see CLIMATE CONTROL POWER AND GROUND CIRCUIT TROUBLESHOOTING  )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION  )
  • Blown fuse No. 14 (10 A) in the under-dash fuse/relay box
  • Poor ground at G402
  • Cleanliness and tightness of all connectors
The A/C condenser fan does not run at all (but the radiator fan runs with the A/C on) A/C condenser fan circuit troubleshooting (see A/C CONDENSER FAN CIRCUIT TROUBLESHOOTING  )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION  )
  • Blown fuse No. 1 (30 A) in the underhood fuse/relay box, and No. 14 (10 A) in the under-dash fuse/relay box
  • Poor ground at G302
  • Cleanliness and tightness of all connectors
Both fans do not run with the A/C on Radiator and A/C condenser fan common circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN COMMON CIRCUIT TROUBLESHOOTING  )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION  )
  • Blown fuse No. 1 (30 A) and No. 4 (20 A) in the underhood fuse/relay box, and No. 14 (10 A) in the under-dash fuse/relay box
  • Poor ground at G302
  • Cleanliness and tightness of all connectors
The A/C compressor clutch does not engage (but both fans run with the A/Con) A/C compressor clutch circuit troubleshooting (see A/C COMPRESSOR CLUTCH CIRCUIT TROUBLESHOOTING  )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION  )
  • Blown fuse No. 1 (30 A) in the underhood fuse/relay box, and No. 14 (10 A) in the under-dash fuse/relay box
  • Cleanliness and tightness of all connectors
A/C system does not come on (both fans and the A/C compressor do not work); heater is OK A/C pressure switch circuit troubleshooting (see A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING  )
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