Automatic Temperature Control
- Description & Operation
- Notes
- Control Assembly
- Sensor System
- Thermostatic Vacuum Regulator (TVR) & Regulated Vacuum Relay (RVR)
- Regulated Vacuum Relay (RVR)
- Range Lever
- Piloted Vacuum Actuator (PVA)
- Pilot Diaphragm Chamber
- Power Diaphragm Chamber
- Selector Switches (Vacuum Disc & Electrical)
- Program Vacuum Disc Switch
- Blower Switch
- Thermostatic Vacuum Valve (TVV)
- Master Switch
- High Blower Relay
- Compressor Ambient Switch
- Bleed Down Rivet
- Adjustment
- Testing & Specifications
- Trouble Shooting & Diagnosis
- Blower
- Operates on "Deice" Only (Temperature below 55°F.)
- Operates When Selector Off and Ignition On
- Operates When Selector Off and Ignition Off
- Operates At Same Speed In Any Position
- No Blower in Deice
- Blower Speeds Erratic or No Change Between Low and High
- Blower Does Not Reach High Speed
- Blower Inoperative
- Blower Operates When Car is Started (Temperature 55°F. or below)
- Blower Operates in High When Selector In Low
- Air Flow
- Air Flows Only from Heater Outlets
- Air Flow Will Not Shift To A/C In High But Will In Low
- System Remains on 100% Recirculated Air and Will Not Switch to Outside Air
- System Will Switch To Outside Air But Will Not Switch To Recirculated Air
- Insufficient Air Flow From A/C Outlets
- Air Always Flows Through A/C Outlets (with Selector in "Defog" or "Deice")
- Air Temperature (Excessive Heat)
- Air Temperature (Insufficient Heat)
- Air Temperature (Excessive Cooling)
- Air Temperature (Insufficient Cooling)
- Additional Symptoms & Diagnosis
- System Does Not Start In "LOW" Or "HIGH"
- No Mode Shift To Heater In "HIGH" Or Heat Out Of A/C Ducts
- Maximum Heat Only Regardless Of Setting
- No "DEFOG"
- No Heat In "HEATER" Mode
- No Blower Any Position
- Deice and A/C High Blower Only
- No Deice Or A/C High Blower
- Does Not Have All Blower Speeds & Changes Erratic
- Compressor Does Not Run
- System Operates Correctly But Does Not Change Temperature
- System Will Not Change Blower Speeds, Temperature or Mode (With normal TVR vacuum)
- Mode Selector Switch Malfunctioning Or Loose
- Blower