Thanks: 
HaHa: 
If you are talking about when the transducer is out of the water and temp is higher than air temp, that is probably because the the sunshine and black plastic of the transducer create quite a bit higher temp than air temp.
Crappie Wall Hanger II
If you are talking about when the transducer is out of the water and temp is higher than air temp, that is probably because the the sunshine and black plastic of the transducer create quite a bit higher temp than air temp.
GrumpyLoomis LIKED above post
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