Affected model seriesmodern dishwasher F-code service family
Quick answer
Minimum wash temperature not reached.
Model compatibility: GE reuses codes across series and model years, so F99 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Minimum wash temperature not reached.
Signs
Symptoms you may notice
The fault may appear during the heating stage.
Washing or drying performance may be reduced.
The dishwasher may stop if the minimum temperature is not reached.
The cycle may run longer while waiting for the expected wash temperature.
Why it happens
Possible causes
A control-board fault after water temperature, heater, and sensing are verified.
A temperature sensor/thermistor that is reporting an incorrect value.
A wiring or connector fault in the temperature/heater circuit.
Incoming water that is below the expected temperature range.
A heater or heater-control problem that prevents the target temperature from being reached.
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Use one normal restart and note whether the code returns specifically during the heating stage.
Confirm the household hot-water supply is operating normally without changing it to an unsafe setting.
Do not bypass the heater, thermostat, or temperature-sensing circuit.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your GE appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
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