Code decoder
Monogram error code library
What the code on your display means, whether it is safe to check yourself, and when to stop and call a technician.
- Codes
- 85
- Appliances
- 13
- Updated
- October 2026
Searches by code, appliance and meaning. Dashes and spaces do not matter.
Er39
Monogram ZHU Induction Cooktop Code Er39: touch board electronics
Cooktop · medium
Er20
Monogram ZHU Induction Cooktop Code Er20: touch board error stored
Cooktop · medium
Er22
Monogram ZHU Induction Cooktop Code Er22: another touch board reading
Cooktop · medium
E7
Monogram ZHU Induction Cooktop Code E7: unidentified system error
Cooktop · high
E9
Monogram ZHU Induction Cooktop Code E9: temperature sensor reading wrong
Cooktop · high
E5
Monogram ZHU Induction Cooktop Code E5: filter board electronics
Cooktop · high
E6
Monogram ZHU Induction Cooktop Code E6: generator board electronics
Cooktop · high
Er31
Monogram ZHU Induction Cooktop Code Er31: filter boards not paired
Cooktop · medium
Er47
Monogram ZHU Induction Cooktop Code Er47: touch board link lost
Cooktop · medium
Lower Thermal Sensor OPEN
Monogram Advantium 240 Code Lower Thermal Sensor OPEN: bottom sensor disconnected
Microwave & Advantium · medium
Lower Thermal Sensor SHORTED
Monogram Advantium 240 Code Lower Thermal Sensor SHORTED: bottom sensor shorting out
Microwave & Advantium · medium
Humidity Sensor OPEN
Monogram Advantium 240 Code Humidity Sensor OPEN: moisture sensor circuit broken
Microwave & Advantium · medium
Abnormal High Temp
Monogram Advantium 240 Code Abnormal High Temp: cavity hotter than the setting
Microwave & Advantium · high
DEMO Mode
Monogram Advantium 240 Mode DEMO: Showroom Setting Active
Microwave & Advantium · low
C5
Monogram ZET Wall Oven Code C5: lower encoder temperature link lost
Wall Oven · medium
C6
Monogram ZET Wall Oven Code C6: lower mode encoder out of contact
Wall Oven · medium
F Code on LCD Screen
Monogram ZTS90 Wall Oven Code F: Function Error Message
Wall Oven · medium
LCD Screen Locked
Monogram ZTS90 Wall Oven: LCD Locked Against Touches
Wall Oven · low
Sabbath Mode
Monogram ZTS90 Wall Oven: Sabbath Mode Active
Wall Oven · low
LOCKED flashes in display
Monogram ZET Wall Oven Message "LOCKED"
Wall Oven · low
F-co
Monogram ZGP Range Code F-co: Stored F code menu
Wall Oven · low
SF
Monogram ZET Wall Oven: SF Menu Will Not Appear
Wall Oven · low
Control Lockout Indicator
Monogram ZHU Induction Cooktop: Control Lock Indicator Lit
Cooktop · low
Blinking ON indicator
Monogram ZHU Induction Cooktop: ON Indicator Blinking
Cooktop · low
E alternating with c
Monogram ZHU Induction Cooktop Code E alternating with c: keys sensed as held down
Cooktop · low
E alternating with o
Monogram ZHU Induction Cooktop Code E alternating with o: induction electronics overheated
Cooktop · high
E (flashing alone)
Monogram ZHU Induction Cooktop Code E (flashing alone): hardware error, call for service
Cooktop · medium
F1
Monogram Advantium 120 Code F1: cavity thermistor reads open
Microwave & Advantium · medium
F2
Monogram Advantium 120 Code F2: thermistor in the cavity is shorted
Microwave & Advantium · medium
F3
Monogram Advantium 120 Code F3: key panel circuit shorted
Microwave & Advantium · medium
F4
Monogram Advantium 120 Code F4: humidity sensor open or shorted
Microwave & Advantium · medium
F6
Monogram Advantium 120 Code F6: cavity running too hot
Microwave & Advantium · high
Control Panel LOCKED
Monogram Advantium Message "Control is LOCKED"
Microwave & Advantium · low
SERVICE MAY BE NEEDED
Monogram Advantium 240 Message "SERVICE MAY BE NEEDED"
Microwave & Advantium · medium
Upper Thermal Sensor OPEN
Monogram Advantium 240 Code Upper Thermal Sensor OPEN: upper sensor circuit broken
Microwave & Advantium · medium
Upper Thermal Sensor SHORTED
Monogram Advantium 240 Code Upper Thermal Sensor SHORTED: upper sensor reads as a short
Microwave & Advantium · medium
CX
Monogram ZGP Range Code CX: Communication error
Professional Range · medium
C1
Monogram ZGP Range Code C1: Main relay board link
Professional Range · medium
C2
Monogram ZGP Range Code C2: Upper temperature encoder
Professional Range · medium
C3
Monogram ZGP Range Code C3: Upper mode encoder
Professional Range · medium
C4
Monogram ZGP Range Code C4: Auxiliary relay board link
Professional Range · medium
C5
Monogram ZGP Range Code C5: Lower temperature encoder
Professional Range · medium
C6
Monogram ZGP Range Code C6: Lower mode encoder
Professional Range · medium
SF
Monogram ZGP Range Code SF: Special features menu
Professional Range · low
Prod
Monogram ZGP Range Code Prod: Factory test mode
Professional Range · low
F2
Monogram ZET Wall Oven Code F2: cavity temperature over the limit
Wall Oven · high
F3
Monogram ZET Wall Oven Code F3: oven sensor open
Wall Oven · medium
F4
Monogram ZET Wall Oven Code F4: oven sensor reads shorted
Wall Oven · medium
F7
Monogram ZET Wall Oven Code F7: a shorted key on the control
Wall Oven · medium
F8
Monogram ZET Wall Oven Code F8: EEPROM data shift failure
Wall Oven · medium
F9
Monogram ZET Wall Oven Code F9: function error flashing on the display
Wall Oven · medium
F8
Monogram ZET Wall Oven Code F8: control memory error after a bad write
Wall Oven · medium
F9
Monogram ZET Wall Oven Code F9: cooling fan stall or open thermal switch
Wall Oven · medium
FC
Monogram ZET Wall Oven Code FC: door latch error
Wall Oven · medium
CX
Monogram ZET Wall Oven Code CX: communication lost between boards
Wall Oven · medium
C1
Monogram ZET Wall Oven Code C1: upper relay board not answering
Wall Oven · medium
C2
Monogram ZET Wall Oven Code C2: upper temperature encoder link lost
Wall Oven · medium
C3
Monogram ZET Wall Oven Code C3: no reply from the upper mode encoder
Wall Oven · medium
C4
Monogram ZET Wall Oven Code C4: lower relay board stops answering
Wall Oven · medium
AUTO Light Flashing
Monogram ZBD9900 Dishwasher Code AUTO Light Flashing: water is not heating up
Dishwasher · medium
HEAVY Light Flashing
Monogram ZBD9900 Dishwasher Code HEAVY Light Flashing: too much water inside the tub
Dishwasher · medium
NORMAL Light Flashing
Monogram ZBD9900 Dishwasher Code NORMAL Light Flashing: thermistor reading out of range
Dishwasher · medium
LIGHT Light Flashing
Monogram ZBD9900 Dishwasher Code LIGHT Light Flashing: the tub is not filling
Dishwasher · medium
SPEED Light Flashing
Monogram ZBD9900 Dishwasher Code SPEED Light Flashing: inlet valve leaking through
Dishwasher · high
RINSE Light Flashing
Monogram ZBD9900 Dishwasher Code RINSE Light Flashing: pressure sensor signal reads high
Dishwasher · medium
AUTO + HEAVY Lights Flashing
Monogram ZBD9900 Dishwasher Code AUTO + HEAVY Lights Flashing: water will not drain
Dishwasher · medium
AUTO + SPEED Lights Flashing
Monogram ZBD9900 Dishwasher Code AUTO + SPEED Lights Flashing: turbidity sensor reading uncertain
Dishwasher · medium
START/RESET Light Flashing
Monogram ZBD6800 Dishwasher Code START/RESET Light Flashing: cycle canceled, tub draining
Dishwasher · low
F6
Monogram ZGP Range Code F6: Lockout switch wiring
Professional Range · medium
F2
Monogram ZGP Range Code F2: Oven over-temperature
Professional Range · high
F4
Monogram ZGP Range Code F4: Shorted oven sensor
Professional Range · medium
F8
Monogram ZGP Range Code F8: Control memory error
Professional Range · medium
F9
Monogram ZGP Range Code F9: Cooling fan airflow switch
Professional Range · high
F3
Monogram ZGP Range Code F3: Open oven sensor
Professional Range · medium
F7
Monogram ZGP Range Code F7: Shorted key input
Professional Range · medium
F6
Monogram ZGP Gas Range Code F6: Door lockout motor circuit
Professional Range · medium
F8
Monogram ZGP Gas Range Code F8: EEPROM data shift failure
Professional Range · medium
F9
Monogram ZGP Gas Range Code F9: Open sail switch
Professional Range · high
FC
Monogram ZGP Range Code FC: Door latch error
Professional Range · medium
Flashing Status Light
Monogram ZDT/ZDP Dishwasher Code Flashing Status Light: Door or Cycle Interrupted
Dishwasher · low
LEAK DETECTED
Monogram ZDT/ZDP Dishwasher Message "LEAK DETECTED"
Dishwasher · high
Start Status Indicator Light Flashing
Monogram ZDT/ZDP Dishwasher: START Light Blinking After Door Opened
Dishwasher · low
Beeping Once Every Minute
Monogram ZDT/ZDP Dishwasher Beeping Every Minute: Door Left Open
Dishwasher · low
Control Panel Lights Go Off While Setting
Monogram ZDT/ZDP Dishwasher Panel Lights Dark During Cycle Setup
Dishwasher · low
Sanitized Light Not Lit at End of Cycle
Monogram ZDT/ZDP Dishwasher: Sanitized Indicator Dark After Cycle
Dishwasher · low
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Code not listed, or no code at all?
A unit that shows nothing often points to a power or control-board problem. Call the desk and we will talk it through.
