English
High altitude control unit
Assy: 4188
Voltage: 24V / For: Air 4D

Product information:

This High altitude control unit is suitable for air heaters AUTOTERM Air 4D with a specific serial number.

Suitable for heaters with the following serial numbers:

  • 4186xxxxxxx
  • 4761xxxxxxx

This 24V control unit is compatible with AUTOTERM Air 4D heaters equipped with the following air pumps (assy numbers): 

Heater equipped with this control unit can work at altitude up to 2500 meters above sea level (MASL).

Interchangeable control units.

Heater
serial number
control unit
Glow plug
HA control unit
HA Glow plug
4D12
4142….
Assy.4144
Assy.3333
Assy.4002
Assy.3333
4D24
4137….
Assy.4139
Assy.3333
Assy.4188
Assy.3333
4D12
3046….
Assy.3048
Assy.2288
Assy.4002
Assy.3333
4D24
3031….
Assy.3033
Assy.2253
Assy.4188
Assy.3333


In order to change the control unit for 44D with control units assy.3048 and assy.3033, you have to change the Glow plug as well.