Thermo King 5D39067G58 Thermoguard unit

Thermo King 5D39067G58 Thermoguard is a refrigerated unit controller that monitors temperature setpoints and displays status via an LCD panel. Common failures for this model include blank or flickering displays (often due to loose connections or failed backlight), power‑supply voltage drops, and internal board faults such as burnt capacitors or damaged ICs. First‑check diagnostics: verify 12 V/24 V input supply with a multimeter, inspect the LCD connector for corrosion or broken pins, and review any stored fault codes via the unit’s diagnostic port; if the display is non‑responsive, test the backlight LED driver circuit before proceeding to board-level repairs.[oss-gpt-20b] Post Comment

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