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If the water heater has an operating problem, there will be a number in the water heater display with
"Service Needed" shown below the error code number. Note the error code and the definition in the
chart below. This label appears on the control box under the water heater display. The following
sections will provide instructions for servicing each error code.
HONEYWELL INTEGRATED CONTROL ERROR CODE
ERROR
CODE
4
LOW FLAME SENSE CURRENT
6
FLAME SENSED OUT OF NORMAL SEQUENCE (BEFORE OPENING GAS VALVE OR AFTER CLOSING GAS VALVE)
23
FLAME DETECTED BEFORE IGNITION
24
FLAME DETECTED AFTER A HEATING CYCLE COMPLETES
29
PRESSURE SWITCH FAILED TO CLOSE OR OPEN (STUCK OPEN)
32
LOWER SENSOR READINGS FAULTY
57
FLAME ROD SHORTED TO GROUND
58
AC LINE FREQUENCY ERROR - SIGNAL TOO NOISY OR FREQUENCY INCORRECT
59
LINE VOLTAGE TOO LOW OR HIGH
61
DC OUTPUT VOLTAGE UNSTABLE
62
MAXIMUM NUMBER OF RETRIES DETECTED
63
MAXIMUM NUMBER OF IGNITION RECYCLES DETECTED
64
ELECTRONICS FAILURE
65
HIGH WATER TEMPERATURE (OVER 200°F)
IF ANY OF THE ABOVE CODES APPEAR ON THE CONTROL DISPLAY, CONTACT YOUR PLUMBER OR QUALIFIED SERVICE AGENT FOR SERVICE OF THE WATER HEATER.
For models with Honeywell Integrated Control
ERROR CODE DEFINITIONS
DISPLAY FOR EF MODEL SERIES
DEFINITION
Error Code Definitions
33
33
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