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warning Miller
Error Code L11: Coolant Overtemp Limit
Indicates overtemperature condition of the cooling system.
? What Causes This
Coolant blockage or degraded thermal efficiency over time leading to higher-than-safe temperatures, poor circulation.
✓ How to Fix It
Check coolant flow and repair any obstructions in cooling pathways; maintain proper liquid levels and cleanliness of fluid medium.
Source: page 47 of the official manual
From the manual
This error code appears in:
Miller ProHeat 35 Industrial Heater