rheem furnace codes

rheem furnace codes

Rheem furnaces are all equipped with an advanced 7-segment diagnostic display you can use as a guide if something goes wrong with your heating system. Unlike many other furnaces, Rheem ones don’t use flashing LED light sequences to indicate errors, and the display will instead give you a simple code you can use for diagnostics. For instance, 0 means the unit is in standby, while H means the heat is on.

The flashing LEDs on your furnace will correspond to a specific fault code that is shown here on their diagnostic chart.

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CODE: Error Code 10.

RESULT: There’s a one-hour lockout in place.

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CODE: Error Code 11.

RESULT: The ignition failed.

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CODE: Error Code 12.

RESULT: Low flame detected.

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CODE: Error Code 13.

RESULT: The flame was lost.

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CODE: Error Code 14.

RESULT: There was an unexpected flame.

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CODE: Error Code 20.

RESULT: There was a twinning fault.

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CODE: Error Code 22.

RESULT: Problem with high limit.

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CODE: Error Code 26.

RESULT: Reversal of line and neutral.

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CODE: Error Code 33.

RESULT: Roll-out switch problem.

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CODE: Error Code 55 / 57.

RESULT: Pressure switch issue.

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CODE: Error Code 58 / 59.

RESULT: Water or condensation problem.

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CODE: Error Code 61.

RESULT: Problem with the blower.

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CODE: Error Code 93.

RESULT: Problem with the control.