LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 1977 >> Vega Base, 2D Hatchback, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Testing & Diagnosis >> Temp. Control Problem Diagnosis >> System Operates Only at Max. Heating

System Operates Only at Max. Heating

This is usually an electrical problem either internal or external to the programmer. Check the following areas:

Disconnected or malfunctioning in-car sensor. Disconnected or malfunctioning ambient sensor in programmer. Open circuit or backed-out terminal in wiring harness sensor string circuit. Disconnected or malfunctioning temperature dial.

scientia non olet · About LEMON Manuals