Product Support - Speed and Temp Troubleshooting

Here are some solutions that have helped many of our customers.

A flashing speed or temp reading or an incorrect temp reading in excess of 3-5 degrees indicates there is a problem.

Temperature Sensors

Check the Connections
Make sure the sensor is properly installed (fully submerged/no pinched cable) and the connectors are clean.

EP-35 or EP-80R
If you have an EP-35 or EP-80R installed as part of an NMEA 2000 network, check the NMEA 2000 menu in the unit. Under bus devices, see if the EP-35 or EP-80R is recognized by the unit. If not, disconnect the sensor, cut off power to the network, then reconnect the sensor, and restore power to the network. Now see if the sensor reads correctly.

Part of a Boat Package
If your unit was part of a boat package, the manufacturer may not have installed a transducer with a built-in temp sensor. Boat manufacturers purchase the display units and then decide what transducer to install.

Phone a friend
If a friend has the same connections on their boat, try your unit on their cables. If your unit works on the other boat, you sensor may need to be replaced.

Update the Software
Make sure your unit has the latest software version. Go to the Software Update page to download the update for free.

Reset the Unit
Sometimes resetting your unit can solve unusual issues. Here is a list of Reset Procedures for Lowrance products. Locate the one that applies to the model you own. Try a Soft Reset first, this will return your settings to factory defaults.

If you decide to try a Hard Reset, save any important stored data to an MMC or SD card or write the information down. The data will be deleted during this process.

Speed Sensors

Installation
The paddlewheel must be in a smooth flow of water to be accurate.

Trolling Speeds
Paddlewheel speed sensors are designed to be accurate at trolling speeds (10mph or slower). For higher speeds, GPS is recommended.

Calibration
The speed sensor can be calibrated. Look in the menu for the Calibrate Water Speed selection.

Check the Connections
Make sure the sensor is properly installed and the connectors are clean.

EP-25 or EP-70R
If you have an EP-25 or EP-70R installed as part of an NMEA 2000 network, check the NMEA 2000 menu in the unit. Under bus devices, see if the EP-25 or EP-70R is recognized by the unit. If not, disconnect the sensor, cut off power to the network, then reconnect the sensor, and restore power to the network. Now see if the sensor reads correctly.

Phone a friend
If a friend has the same connections on their boat, try your unit on their cables. If your unit works on the other boat, you sensor may need to be replaced.

Update the Software
Make sure your unit has the latest software version. Go to the Software Update page to download the update for free.

Reset the Unit
Sometimes resetting your unit can solve unusual issues. Here is a list of Reset Procedures for Lowrance products. Locate the one that applies to the model you own. Try a Soft Reset first, this will return your settings to factory defaults.

If you decide to try a Hard Reset, save any important stored data to an MMC or SD card or write the information down. The data will be deleted during this process

If you have reviewed the troubleshooting information above and still believe that you need additional assistance, please choose one of the following options:

If you need to speak with a Customer Service agent, please call our toll-free Customer Service line at 1-800-324-1356. Technicians and representatives are available to help you Monday through Friday from 8 a.m. to 5 p.m. CST, except holidays.