Audi 80 Quiz
Cooling System

Cooling System - Malfunction List

In this manual: Cooling System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

Malfunction Cause Remedy
A. Temperature gauge is at the stop on the right, warning lamp flashing 1. 4-cylinder engine only: V-ribbed belt is too loose or broken
2. Coolant level too low
3. Temperature gauge wire shorted to ground
4. Thermostat does not allow cold water from the radiator to flow in (radiator is cold)
5. Cooling fan does not switch on
6. Pressure relief valve in the radiator cap is faulty
7. Gauge voltage stabilizer is faulty
8. Radiator fins clogged		 Check belt tension or replace the belt
Top up
Disconnect the temperature sender wire. The gauge needle should return to zero or the red warning lamp should go out. If not, a short to ground has occurred; check the wiring routing
Remove the thermostat and continue driving without it, or call a tow truck
Have the cap checked in a workshop and replace if necessary
Replace
Clean the radiator
B. Temperature gauge responds very slowly, weak heat output Thermostat does not close fully; heated coolant passes through the radiator too early Clean the thermostat; replace if necessary
Temperature gauge remains in the lower range, good heat output 1. See A72 Temperature gauge sender is faulty Replace

Test yourself

A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.