Digital Temp Stuck on C

[thecichlidpleco]

Not that I cannot convert, but my lifegard aquatics big digital temp alert is stuck on C, how do I change it to F?

 

[Toddrtrex]

I had the smaller one many many years ago, and I think that were was a little switch on other the side or the back. Should just have an "C" and an "F" and slide the switch to the "F" side.

 

[thecichlidpleco]

Nope that is not located on mine, emailed a rep, and they said there is no way to go back and forth between F and C, so why are both programmed in the unit?