Engine Heater SafeStart 400 series

Hose heaters - no thermostat

Hose heaters in the 400 series (except 420-423) have flanges shaped like a metal pipe and a built-in thermostat


The flange in 400 series heaters (except 420 – 423) consists of a metal pipe. This pipe can surround all of, or parts of, the active element. The heater is placed in a specified location in one of the engine’s water hoses, end on end with a metal component, such as on the water pump. In this way, the entire active part of the element is surrounded by metal.


Normal usage – DEFA engine heaters are designed for “normal usage.” DEFA defines “normal usage” as; 3 connections for 3 hours pr. 24 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 required 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

Up to 26-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