Garmin Force Trolling Motor Heading Sensor Calibration

What Does This Error Mean?

'Heading Sensor Calibration Required' means the Garmin Force's internal compass needs calibration to know which direction it's facing.
This typically appears at first install, after a firmware update, or after the motor was moved between boats.
Calibration takes 2 minutes — drive in slow circles in open water, away from large metal objects.
The sensor learns the boat's compass headings.

Affected Models

Garmin Force trolling motor
Garmin Force Kraken

Common Causes

First-time install — compass never calibrated
Magnetic interference from new metal nearby
Compass drift over time
Recent firmware update reset calibration
Motor recently moved or impacted

How to Fix It

Move to open water.

Calibration needs space away from large metal objects.
Move the boat 50-100 yards from other boats, docks, the boat trailer, or large vehicles.
Engine off, foot pedal in hand.
Confirm GPS lock on your Garmin chartplotter.
Open calibration menu on the chartplotter.

On a paired Garmin chartplotter: Menu → Trolling Motor → Compass Calibration.
Or via the Garmin Force app if no chartplotter.
The interface guides you through the procedure.
Spin the boat in circles.

Use the trolling motor at low speed.
Drive the boat in slow circles — about 30 seconds per full rotation.
Continue for 2-3 full rotations.
The unit reads compass values at each heading and builds calibration data.
Watch for calibration complete.

When successful, the chartplotter shows 'Calibration Complete'.
If 'Calibration Failed', try in a different open-water spot with less metal interference.
Sometimes 2-3 attempts in different locations are needed before success.
Test heading hold.

After calibration, engage Heading Hold or Anchor Lock.
The motor should hold its commanded heading consistently.
Small corrections are normal in current/wind, but it should track within a few degrees.
Major drift means calibration didn't take — try again.

Frequently Asked Questions

How often do I need to recalibrate?

Once at install, then only when prompted or after major changes (firmware updates, motor moved between boats, impact damage).
You don't need to calibrate before each trip.
Frequent recalibration prompts mean an underlying issue — possibly heading sensor failure.

What causes calibration to fail?

Most often: magnetic interference from large metal nearby (other boats with steel hulls, marine docks with heavy iron, parking lot vehicles).
Move further away.
Open water is ideal.
If calibration consistently fails in clean open water, the heading sensor itself may be failing — Garmin support.