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[Rob428]

Hi I have set up my 1813 , as a transmission temp gauge , and cannot figure out how to get it to turn the thermo fan at the trans cooler  , with AL settings, it seems to only work below the set temp , I am currently using the alarm as an earth to turn on the fan relay.. read the instructions about 19 times

[Kkane]

To use the alarm relay output as high temperature alarm, you need to set AH higher than AL.

For example, to turn on your fan when temp is over 100F, set AH = 100 and AL = 99.

See note 5a on page 2 of its manual.