Automatic Temperature Control
- Description
- Operation
- Control System Components
- Adjustments
- Diagnosis & Troubleshooting
- How To Isolate The Problem
- Temperature Control Problem Diagnosis
- System Operates Only At Maximum Air Conditioning
- System Operates Only at Max Heat
- System Fluctuates Blower Speeds And/Or Mode Shifts During Acceleration
- Dial Setting Does Not Provide Comfort
- Blower Cycling And Mode Cycling
- Insufficient Heating Or Cooling
- Blower Speeds And Mode Shift Occurs Without Temperature Change
- Blower Control Circuit Problem Diagnosis
- System Operates Only At Low Blower
- No Blower Operation in Any Lever Setting
- No Blower in "OFF" or "LO" Settings
- Operates at Low Blower Only Except in "HI" and "DEF"
- Blower Operation Only in "HI" or "DEF"
- Blower Operates at Low Speed in "HI" and "DEF"
- Blower Operates With Ignition Off
- Blower Speeds Skipped In "ECONOMY" Or "AUTO" Setting
- No Heater Turn On in Cold Weather Except in "DEF"
- Immediate Heater Turn-On In Cold Weather
- A/C Delayed In Hot Weather Until Engine Warms Up (Unless Control Lever Is In "LO" Or "DEF")
- Auxiliary Vacuum Problem Diagnosis
- Auxiliary Vacuum Circuit Test Procedure