Engine Heater SafeStart 200 series

Heaters with threaded flange

Heaters in the 200 series have a threaded flange. They are used in vehicles that have an accessible threaded plug in the coolant tank.


DEFA has focused on easy installation and optimal heating functionality during the development of engine preheaters. For different engine and vehicle combinations, DEFA has nine primary heater elements with more than 500 variants and over 5000 individual applications.

These heaters have a threaded flange and are used in vehicles which have an accessible threaded plug in the coolant tank. The heater flanges in this series are disc or head-shaped. A seal is formed by the threads, an O-ring, a seal, etc. In most cases, the flange is designed in a way that allows the element to remain in place while the flange is turned.

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

Usage definitions

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

Tests on a medium sized vehicle show that a 600W 200-series heater will increase the coolant temperature approximately 50 C in relation to the outdoor temperature when connected for 195 minutes at an outdoor temperature of -17 C or colder. After 195 minutes the system has achieved thermal balance. Heating for longer that 195 minutes at -17 C or will lead to energy waste. We recommend using a timer.

Please look at the product sheet for DEFA SmartStart or DEFA Futura.

Up to 26 pr. pack, depending on the size of the heater.

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