GE · Dishwasher Moderate

C5 — Underfill / Short Drain Time

C5 indicates the drain time was unusually short — the control detected the dishwasher was underfilled with water during the cycle. It points to a fill problem (water supply, inlet valve, or float) or water escaping the tub, not a heating problem.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
geappliances.com ↗

How to fix it

  1. Confirm the water supply shutoff valve under the sink is fully open and the supply line is not kinked.
  2. Check the overfill float (upside-down cup at the front left of the tub floor): lift it and let it drop — it should move freely. Clean any debris under it.
  3. Start a cycle and verify water enters the tub for the full fill period; a weak or short fill points to the inlet valve.
  4. Disconnect power, then test the water inlet valve solenoid for continuity; replace the valve if open or if the screen is heavily scaled.
  5. Inspect under the tub for leaks (door gasket, diverter, hose clamps) that could be dumping fill water.
  6. If fill volume and valve test good, suspect the float switch circuit or main control.

Why it happens

Typical signs: C5 mid- or late-cycle · Dishes not drying · Water never gets hot · Cycle runs unusually long

  • Faulty water inlet valve Valve restricted or failing to open fully, so the tub never reaches its proper water charge.
  • Low supply pressure or partially closed shutoff valve Kinked or clogged supply line, or a supply valve under the sink that isn't fully open.
  • Stuck or defective overfill float Float stuck in the up position cuts the fill short; tap the float cover (front left corner of the tub floor) to free it.
  • Water escaping the tub Tub or door gasket leak, leaky diverter valve, or a clogged pump inlet leaves too little water for the cycle.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • GE dishwasher water inlet valve Common replacement
    Amazon →
  • GE dishwasher overfill float switch Common replacement
    Amazon →

More GE dishwasher codes

1h 1h — Delay Start Active C1 C1 Error — Slow Drain (Over 2 Minutes) C2 C2 Error — Drain Cycle Too Long (Over 7 Minutes) C4 C4 — Overfill / Filled Twice After Power Loss C7 C7 — Water Temperature Sensor (Thermistor) Fault C8 C8 — Detergent Dispenser Fault

All GE codes → All dishwasher codes →

Frequently asked questions

What does the C5 code mean on a GE dishwasher?

C5 indicates the drain time was unusually short — the control detected the dishwasher was underfilled with water during the cycle. It points to a fill problem (water supply, inlet valve, or float) or water escaping the tub, not a heating problem.

What causes the C5 code on a GE dishwasher?

Faulty water inlet valve: Valve restricted or failing to open fully, so the tub never reaches its proper water charge. Low supply pressure or partially closed shutoff valve: Kinked or clogged supply line, or a supply valve under the sink that isn't fully open. Stuck or defective overfill float: Float stuck in the up position cuts the fill short; tap the float cover (front left corner of the tub floor) to free it.

Is it safe to keep using a GE dishwasher with a C5 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix C5 on a GE dishwasher?

Confirm the water supply shutoff valve under the sink is fully open and the supply line is not kinked. Check the overfill float (upside-down cup at the front left of the tub floor): lift it and let it drop — it should move freely. Clean any debris under it. Start a cycle and verify water enters the tub for the full fill period; a weak or short fill points to the inlet valve.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: geappliances.com.