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Heating Equipment Error Codes

13 error codes across 1 brands. Find your code, what it means, and how to fix it.

Miller

13 codes
Fault LED

Fault LED indicator on the front panel that lights up to indicate a system fault condition.

L01

Thermocouple #1 Open — the first temperature sensor is not functioning or is disconnected.

L02

Thermocouple #2 Open — the second temperature sensor is not functioning or is disconnected.

L03

Thermocouple #3 Open — the third temperature sensor is not functioning or is disconnected.

L04

Thermocouple #4 Open — the fourth temperature sensor is not functioning or is disconnected.

L05

Thermocouple #5 Open — the fifth temperature sensor is not functioning or is disconnected.

L06

Thermocouple #6 Open — the sixth temperature sensor is not functioning or is disconnected.

L07

Output Voltage Limit — the output voltage has reached its limit, reducing available power.

L08

Output Voltage Limit — the output voltage has reached its limit due to coil configuration or cable length.

L09

Output Current Limit — the output current has reached its limit, reducing available power.

L10

Output Current Limit — the output current has reached its limit due to coil configuration.

L11

Coolant Overtemp Limit — the coolant temperature has exceeded the maximum operating temperature.

Limit LED

Yellow Limit LED indicator on the front panel that flashes to indicate a system limit condition has occurred.

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