Thermo King 5D49820G Circuit Board Repair Service

Professional diagnostic and board-level repair service for this Thermo King 5D49820G Circuit Board.

Thermo King 5D49820G is a relay control board used in transport temperature control and refrigeration systems to manage accessory power and fan/ignition circuits. Common failures include burnt or tripped relays, degraded solder joints on the 12 V input traces, and capacitor leakage causing intermittent power loss; these often manifest as erratic fan operation or system shutdowns. First‑check steps: verify the 12 V supply to the board with a multimeter, inspect all relay contacts for corrosion or mechanical damage, and review any diagnostic codes from the vehicle’s HVAC control module. Post Comment

Need your Thermo King 5D49820G Circuit Board repaired?

Ship your unit to our North Carolina repair shop for component-level diagnostics and a repair estimate. We service industrial control electronics and power systems nationwide.

• ⚙️ Board-level diagnostics – Troubleshooting beyond simple module replacement
• 🔁 Clear approval process – No repair begins without your approval
• 🧰 Expert Technicians – Decades of board-level experience
• ✅ 1-Year Warranty – Included with completed repairs

Start a Repair Request   Call 1-336-969-0110

Nationwide service • Industrial-grade testing • 1-year warranty on completed repairs

Owner-Operated • Practical Pricing • 1-Year Warranty • Nationwide Service

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