
Webasto Thermo & Comfort N.A., Inc. 8 www.techwebasto.com
Purpose / Version Thermo Pro 90
3. Purpose / Version
3.1 Purpose of the Coolant Heater
The Webasto Thermo Pro 90 coolant heaters are used in
connection with the vehicle’s own heating system
– to heat the cab,
– to defrost vehicle windows and
– to preheat water-cooled engines,
– to heat boats and motor-homes (recreational vehicles)
The water heater operates independently of the engine
and is connected to the cooling system, the fuel system
and the electrical system of the vehicle.
The Thermo Pro 90 heaters differ from each other in their
component connection arrangement and in the fact that
they have different control units.
3.2 Versions
3.2.1 Thermo Pro 90 version
Thermo Pro 90 12V / 24V diesel
Water heater for “diesel” fuel
The water heaters are designed for 12 V and 24 volts.
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