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GREAT BRITAIN • CUSTOMER SERVICE

  tel. 020 8247 9300  e-mail [email protected]  internet www.clasohlson.co.uk

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Ver

. 20150604

Engine Block Heater Timer with 
Temperature Sensor

Art.no  36-6047 

Model EMT448

Please read the entire instruction manual before using the product and then 
save it for future reference. We reserve the right for any errors in text or images 
and any necessary changes made to technical data. In the event of technical 
problems or other queries, please contact our Customer Services.

Safety

Never try to dismantle, repair or modify the product in any way.

Buttons and functions

Operating instructions

Note:

 The timer has a built-in battery which is charged when the timer is 

plugged into a wall socket (charging time is 2 hours). It is therefore possible to 
make settings (if the battery is charged) even when the timer is not plugged into 
the wall socket. The display backlight cannot be lit when the timer is unplugged 
from the wall socket.

Setting the clock

1.  Hold in [ OK ] until the hours flash.
2.  Press or hold in [ +1 ] or [ −1 ] to set the hours.
3.  Press [ OK ] – the minutes display will flash.
4.  Press or hold in [ +1 ] or [ −1 ] to set the minutes.
5.  Press [ OK ] to confirm and exit the clock set mode.

Setting the departure time

1.  Press [ SET ]. The hours will then begin to flash.
2.  Press or hold in [ +1 ] or [ −1 ] to set the hours.
3.  Press [ OK ] – the minutes display will flash.
4.  Press or hold in [ +1 ] or [ −1 ] to set the minutes.
5.  Press [ OK ] to confirm and exit the settings mode.

Display backlight

Note:

 The display backlight can only be lit when the timer is plugged into 

a wall socket.
•  The backlight will come on for 10 seconds whenever any of the buttons 

is pressed.

•  Hold in [ SET ] for 3 seconds to switch the backlight to “always on” mode.
•  Hold in [ SET ] again to switch off the backlight and set it to “on for 

10 seconds when button pushed” mode. 

Note:

 After you have held in 

the button for 3 seconds to change the backlight from “always on” mode, 
the backlight will shine for 10 seconds before going out.

Preset programmes

If you have for 
example set your 
departure time to ...

and the temperature 
where the timer is 
located is ...

the timer will switch 
the heater on at

07:00

5 °C ± 2 °C

30 min before departure

07:00

0 °C ± 2 °C

60 min before departure

07:00

−5 °C ± 2 °C

90 min before departure

07:00

−10 °C ± 2 °C

120 min before departure

07:00

−15 °C ± 2 °C or lower

180 min before departure

•  The timer will not switch the heater on if 

the temperature where the timer is located is above 
5 °C. If the temperature rises to above 7 °C when 
the heater is on, the timer will switch the heater off.

•  The heater will stay on 30 minutes past the set 

departure time. 

Example:

 It is −10 °C and the timer 

switches the heater on 120 min before the set 
departure time (see above). During these two hours, 
the temperature drops to −15 °C, the timer does not 
react to the change in temperature but operates in 
accordance with the initial temperature detection of 
−10 °C.

•  It takes about 45 minutes for the timer to adapt to 

a new temperature such as when it is taken out into 
the cold from a warm indoor environment.

•  Always make sure to insert the timer into the wall 

socket so it is orientated as shown in the picture.

1.  Clock
2.  Departure time
3.  [ SET ] departure time setting
4.  [ OK ] clock setting, confirm
5.  Time elapsed since the heater was switched on
6.  [ −1 ]  Setting
7.  [ RST ] Reset all settings (the departure time resets to a default setting of 07:00)
8.  [ +1 ]  Setting

Note:

Time elapsed since the heater has been switched on only 
shows when the heater is switched on.

Care and maintenance

•  Clean the timer by wiping it with a dry cloth.
•  The timer should be unplugged from the wall socket if it is not to be used for 

a long time.

Troubleshooting guide

The timer 
does 
not work.

•  Check the clock and timer settings and adjust if necessary.
•  Try plugging the engine/car heater directly into the wall 

socket without the timer, to see if everything works.

•  Make sure that the cable between the timer and the car is 

intact and properly plugged into both the timer and car.

•  Check that the car heater is switched on, that the cable is 

intact and properly plugged into the outlet in the passenger 
compartment.

•  Try plugging the car heater into another electrical outlet to 

make sure that it works.

•  Is the wall socket that the timer is plugged into live?

Disposal

This product should be disposed of in accordance with local regulations. 
If you are unsure how to proceed, contact your local council.

Specifications

Power supply 

230 V AC, 50/60 Hz

Load capacity 

3680 W, 16 A

Operating temperature 

−20 to 45 °C

IP rating 

IP44

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