My temperature reading is off

HEY!! Welcome to TFP! :swim:

I believe that on the BLH, the temperature sensor is in the cell and the BLH will sense and protect high and low temperatures. It is likely an indication that the temp. sensor in the cell has failed. How old is the cell? Is it in the sun or shade?
 
You will need to contact the manufacturer. Ive never seen a SWG temp sensor that was not integrated in the cell and user serviceable.
 
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