Garmin G1000 Nav III Error MDF1: The MFD supply voltage is low

G1000 Nav III · taken from the manufacturer’s manual, pages cited

Fault codeMDF1

The MFD supply voltage is low means the Multi-Function Display's power is insufficient, requiring verification that its rear connector is securely connected. The manual's first action is: “• Ensure the MFD rear connector is properly connected”

Model
Garmin G1000 Nav III
Display shows
The MFD supply voltage is low (MDF1)
Type
Fault code
Source
Manual p. 65

What MDF1 means

The MFD supply voltage is low p. 65

Common causes

  • The MFD supply voltage is low. p. 65

What to do

  1. • Ensure the MFD rear connector is properly connected p. 65
  2. • Check wiring p. 65

Before you service the product, read the safety instructions in the manual p. 4.

If MDF1 is still not resolved

  • Contact service / dealer p. 3
    “KEEP AWAY FROM LIVE CIRCUITS. Maintenance personnel shall ob serve all safety regulations at all times.”
  • Contact service / dealer p. 127
    “Loading the wrong software into GIA63/63W units may cause an inoperable condition that is not covered by warranty .”
Open the manual at page 65 All G1000 Nav III error codes Manual details & download

This page summarises what the manufacturer’s manual says about MDF1; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Garmin. Found a mistake? Report an error.