Bluetooth® programmable control unit

WarmUp control unit

Operate your DEFA WarmUp electrical preheating system with your mobile phone.

Art. nr: 440053


A complimentary component to our electrical preheating system, this unit allows you to control the heating system via Bluetooth and your mobile phone. You can also program your heating system so that your vehicle is ready when you need it, without wasting electricity or using fuel. No subscription is required to use Bluetooth control.


  • Choose automatic heating durations time based on temperature
  • Choose between 1-4 hour set heating times
  • Set two departure times per weekday
  • Program departure times for each day of the week
  • Show the next planned departure time
  • Turn the engine and interior heater ON/OFF
  • Battery voltage level monitoring
  • Monitor the outside temperature
  • Use the Oversleep function to keep the vehicle heated for 2 hours after the set departure time

*Some features require Bluetooth® connection.

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.

Operating temperature
IP rating
-40°C / +80°C
8-32V DC
HWD: 112/46/24mm
Bluetooth Smart/2,4GHz
Inside and around the car
35g (Bluetooth Hub), 150g (Cable mat)