GE Dishwasher C6 — What It Means & How to Fix It
C6 means the water arriving at the dishwasher is colder than the roughly 120°F it wants — usually a water-heater setting or cold water sitting in the supply line, not a fault inside the machine.
What this code means
C6 reports that incoming water temperature is too low for proper washing, which GE pegs at around 120°F. This is most often about the household hot water rather than the dishwasher: a water heater set low, a long pipe run full of cold water, or hot water being drawn off elsewhere at the same time. It is one of the more reassuring codes, since the fixes are settings and habits rather than parts.
C6 concerns incoming water temperature on GE's C-code dishwashers; the separate C7 covers the temperature sensor itself. If your model shows a different low-temperature code, check its manual.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Water heater set too low | Common | Yes — adjust setting |
| Cold water standing in the supply line at start | Common | Yes — run the tap first |
| Hot water used elsewhere during the cycle | Occasional | Yes — avoid overlap |
| Long pipe run losing heat before the dishwasher | Occasional | Yes — run a longer cycle |
What you can try yourself
- Before starting the dishwasher, run the kitchen hot tap until the water turns genuinely hot — this purges cold water sitting in the line.
- Check that your water heater is set to deliver about 120°F; many are set lower and fall short of what the dishwasher expects.
- Avoid running showers or laundry while the dishwasher is on, so it isn't competing for hot water.
- Select a longer or heavier cycle, which gives the dishwasher more time to bring water up to temperature on its own.
- Run a cycle and see whether C6 stays away once hotter water is reaching the unit.
When to call a technician
- C6 persists even with verified hot water arriving at the tap next to the dishwasher — the temperature sensor or heating circuit may be involved.
- Dishes come out cold and poorly cleaned despite a hot supply.
- C6 appears alongside C7, which points at the sensor rather than the supply.
Typical professional repair cost: Usually free — a setting or timing fix. If the heating circuit is genuinely at fault, a technician repair commonly lands between $150 and $300.
Frequently asked questions
Is C6 a broken heating element?
Not usually. C6 is about the temperature of the water coming in, so the first suspects are your water heater setting and cold water sitting in the supply line. A genuine heating-circuit fault is possible but less common, and that part is a technician's job rather than a DIY step.
Why does running the tap first help a C6 code?
The pipe between your water heater and the dishwasher fills with cold water between uses. Running the hot tap until it is hot pushes that slug of cold water out, so the dishwasher starts with hot water instead of heating it from cold.
What temperature should the water be for a GE dishwasher?
GE targets roughly 120°F at the inlet. Below that, cleaning and drying suffer and C6 can appear. Setting your water heater to about 120°F and purging the line first usually keeps the dishwasher in range.
Related GE codes
- GE Dishwasher C1 Your GE dishwasher is draining, but too slowly for the control's liking — the water path is partly restricted, usually at the air gap, the drain hose, or a disposer that hasn't been run.
- GE Dishwasher C2 Draining ran well past the time GE allows — about seven minutes — pointing to a heavier blockage than the milder C1, though the things to check are the same trio.
- GE Dishwasher C3 The dishwasher didn't drain at all, and GE's first move for C3 is a brief power reset — if water still won't leave afterward, the drain path or pump needs attention.
- GE Dishwasher C4 C4 means the dishwasher refilled twice after a power interruption, which usually traces to a stuck overfill float or a clogged sump rather than anything electrical.
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