Error code · Dishwasher

GE Dishwasher Code C4: Tub Filled Twice After a Power Failure

Medium · inspection needed

Code: C4
Appliance: Dishwasher
Brand: GE
Warranty: 30-day workmanship

What C4 means

On GE electronic dishwashers that show C-codes, such as the GDT530PSDSS, C4 means the tub filled twice after a power failure. The control found water where it expected a fresh start, and one cause is a float switch that is stuck or not working. A clogged drain or sump can also hold the water. You will see C4 on the display and the cycle halted. Water may be sitting higher than normal in the tub.

Common causes of C4

Float switch stuck in the raised position
Float cover pinned by debris
Drain or sump clogged with food
Water left in the tub after a power interruption

✓ One safe check you can try

1. Touch Start, then touch Cancel or Reset. 2. Gently tap the float cover in the tub with your finger so it moves freely. 3. Check the sump area at the bottom for bits of food or glass and remove them. 4. Start a cycle again. If C4 returns, stop and schedule a visit.

! Why to stop there

Freeing the float cover does not prove that the switch behind it works.
We test the float switch and the fill valve, and check whether the drain path holds water.
A written price comes before we begin.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Dishwasher codes

Smart Assist light redGE Dishwasher Smart Assist Light Red: A Potential Problem Was Detected Smart Assist light yellowGE Dishwasher Smart Assist Light Yellow: A Notification Is Waiting in SmartHQ Start light flashingGE Dishwasher Start Light Flashing: Door Opened or Cycle Interrupted Low Rinse AidGE Dishwasher Low Rinse Aid Indicator: Refill the Dispenser H20 (spelling variant)GE Dishwasher Code H20: Fill Brought in Too Little Water H2OGE Dishwasher Code H2O: Low Water in the Tub LEAK DETECTEDGE Dishwasher Message LEAK DETECTED: Cycle Canceled by the Control nH (Delay Start)GE Dishwasher Display nH: Delay Start Counting Down

C4C4 questions

Why did C4 appear on my GE dishwasher?

The tub filled twice after a power failure. It usually points to a stuck float switch, or to a clogged drain or sump holding water.

Why does a power cut cause C4?

After power returns, the control checks the water level. If it sees water it did not expect, a float that is stuck or a drain that is blocked makes it fill again.

How can I check the float myself?

Tap the float cover in the tub lightly so it moves up and down. Do not take anything apart. If it sticks or the code returns, we should test it.

Book a visit

Still seeing C4?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 547-5545