Engine Heater SafeStart 100 series

Conical cup flange

Heaters in the 100 series can only be installed in vehicles with cast iron engine blocks. It's designed for engines with a small coolant tank.


These heaters have a flange shaped like a cup so that the active element fits within the cup. The heater is fastened with a press fit. This heater is used with engines that have coolant tanks that are too small for other heaters. It can only be installed in vehicles with cast iron engine blocks. The heater is available with conical surfaces in different diameters, making it possible to use it for different types of engines.

Engine pre-heaters are supplied separately because of specific necessary adaptations to each individual engine and vehicle type.


Normal usage – DEFA engine heaters are designed for “normal usage.” DEFA defines “normal usage” as; 3 connections for 3 hours pr. Twenty-four hours for 150 days (5 months) a year.

Professional use – For use emergency vehicles or other vehicles where the heater is in use continually, yearly controls are necessary. It might be needed to install a replacement heater. DEFA AS will not cover the yearly service cost.

NOTE! Pulse power – Some parking facilities use interval (pulse) power timers that turning the power On and Off several times per hour. Using a DEFA engine heater in combination with these timers is NOT considered “Normal use” and claims will be declined.

Technical description

DEFA AS conforms to the requirements of both ISO 9001- 2008, ISO 14001:2004 and OHSAS 18001:2007. In addition, our engine heaters and cables conform to the requirements of ISO/TS 16949:2002.

IP rating