Golf GTI L4-1781cc 1.8L SOHC (RD) (1987)
Coolant Temperature Sensor / Switch HVAC: Pressure, Vacuum and Temperature Specifications
First stage closes ............................................................................................................................................................. 84°C (183.2°F) to 97°C (206.6°F)
Second stage closes ....................................................................................................................................................... 94°C (201.2°F) to 108°C (226.4°F)