Product information:

This 3-position switch is suitable for liquid heater AUTOTERM 30SP-24

Switch position functions:

Off - position

Heating process is stopped.

On  - position

Heater start heating coolant till coolant temperature reaches 82° C / 179.6° F, then heater goes into “cooling” mode, combustion process is stopped, pump continues operating to ensure liquid coolant circulation in vehicle cabin

heating system. If liquid coolant temperature drops under 72° С / 161.6° F, heater starts heating cycle again.

Circulation - position

Water pump circulates liquid coolant without heating process. 

This function is also used to bleed out air from coolant system.

This switch is included in AUTOTERM 30SP-24 standard installation kit.