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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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11/21/25

Message Overview:

Message Name:

L WINDOW HEATER/WIRING [SHORT]

Message Code:

3040013IN

Associated CAS:

L WINDOW HEAT FAIL
(Caution)

Reporting LRU: Left Windshield Temperature Controller (WTC)
System Description: 30-41-00 - Windshield And Side Window Anti Icing
Schematic Diagram: [ G5000 ]  [ Global Express ]  [ Global XRS ] SSM 30-41-00-101 - Windshield Temperature Control System
Wiring Diagram: [ G5000 ]  [ Global Express ]  [ Global XRS ] WM 30-41-01-1_001 - Sheet 1 - Temperature Control (Left) - ALL
[ G5000 ]  [ Global Express ]  [ Global XRS ] WM 30-41-00-1_001 - Sheet 1 - Left Hand Side - ALL

Message Description:

The Left Window Heater/wiring has been detected Short Circuit (Heater Current ≥ 50 ±10 A).

Possible Causes:

  • Left Side Window Heater
  • Left Windshield Temperature Controller (WTC) (A164)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

Quick Links:

Removal of the Windshield and Side Window Temperature-Controller AMM 30-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Windshield and Side Window Temperature-Controller AMM 30-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Side Windows AMM 56-10-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Side Windows AMM 56-10-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Remove all connectors from the left WTC. Inspect connectors and pins for damage/defects.

    1. If no defects or damage is found, reconnect the WTC connectors and continue with next step.
    2. If defects or damage is found, repair/rectify as required.

  2. Perform wiring checks between Left window heater and L WTC.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  3. Measure the Heater resistance. The total resistance of the anti-fog coating when measured between terminal blocks shall be 27.47 to 33.57 ohms.

    1. If resistance is within range, go to step 4.
    2. If resistance is out of range, continue with next step.

  4. Interchange WTCs. Replace if necessary.

    1. If systems checks out, do close out.
    2. If fault remains, continue with next step.

  5. Replace left-side Window.
  6. Do close out.

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