Installation manual

www.webasto.us 29 Webasto Thermo & Comfort N.A., Inc.
Thermo Pro 90 Electrical Connections
11.3 Vehicle Fan
The vehicle's own heater fan can be controlled using a relay, see circuit diagram Figs. 33 or 34 (connecter X8 contact 2
Violet or contact D of X13.
11.4 Setting Control Temperatures of Thermo Pro 90
When the ignition signal is connected to the control unit connector X8, contact 7, different control thresholds are
effective.
If the terminal D+ signal is not applied, the temperatures are the same as those at “Engine off”.
Nominal Temperature on Sensor Regulation Temperature Switch on Again After Regulation Temperature
Engine “ON” 65°C (149°F) 75°C (167°F) 60°C (140°F)
Engine “OFF” 80°C (176°F) 90°C (194°F) 75°C (167°F)