What does GE Dishwasher C1 Error Code - Causes & Fix mean?

C1 means the drain was partly blocked and pump out ran too long. Most often a clogged filter, air gap, or kinked drain hose.

How do I fix GE Dishwasher C1 Error Code - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with C1 active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for GE Dishwasher C1 Error Code - Causes & Fix?

The most frequently replaced parts for GE Dishwasher C1 Error Code - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is GE Dishwasher C1 Error Code - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

GE Dishwasher C1 Error Code - Causes & Fix

GE Dishwasher C1 Error Code — What It Means

The C1 code shows the dishwasher tried to pump out but the drain took longer than the control allows. GE flags this when the drain time runs past about two minutes.

This points to a partial restriction in the drain path rather than a dead pump. Water still moves, just too slowly.

Jump to Fix

Common Causes

Clogged filter or sump Food debris packs the bottom filter and slows the drain to a crawl.
Blocked air gap The countertop air gap fills with gunk and chokes the outflow.
Kinked drain hose A bent or crushed drain hose behind the unit restricts the pump out.
Clogged disposer inlet A new disposer with the knockout plug still in place blocks the drain line.
Partial drain pump obstruction A small piece of debris in the pump slows the impeller without fully jamming it.

Step-by-Step Fix

Cut power at the breaker and pull out the lower rack.
Remove and rinse the bottom filter and clear any debris in the sump.
Clean the countertop air gap if your setup has one.
Check the drain hose for kinks and straighten any sharp bends.
If the unit drains into a disposer, confirm the knockout plug was removed.
Restore power, run a rinse cycle, and watch that the water clears fully.

Parts Often Needed

Part	Notes
GE dishwasher filter assembly	Amazon \| Replace if the mesh is torn or warped so debris keeps reaching the pump.
Dishwasher drain hose	Amazon \| Swap in a fresh hose if the old one is permanently kinked or crushed.

When to Call a Pro

If the filter, air gap, and hose are clear and C1 keeps returning, the drain pump may be weakening. A technician can test the pump and check the control before you spend on parts.