Water supply error — dishwasher not detecting adequate water fill level
The C1 error on the GE GDT635HSMSS indicates water supply error — dishwasher not detecting adequate water fill level. This typically occurs due to hot water supply valve under the sink not fully open. Most homeowners fix this in 20–30 min by following the steps below.
Common Causes of C1
- 1Hot water supply valve under the sink not fully open
- 2Clogged water inlet screen at the dishwasher connection
- 3Kinked or pinched supply hose
- 4Failed water inlet valve not allowing water to enter the tub
How to Fix C1
- 1
Step 1
Cut power to the dishwasher and disconnect it
- 2
Step 2
Open the cabinet under the sink and verify the hot water valve is turned fully counterclockwise to open
- 3
Step 3
Check the supply hose from the valve to the dishwasher for kinks or crimps
- 4
Step 4
Disconnect the supply hose from the dishwasher inlet and inspect the screen filter for sediment
- 5
Step 5
Clean the screen under running water and reinstall it with the hose securely reconnected
- 6
Step 6
Restore power and run a quick wash cycle to confirm the error clears
Tools Needed
When to Call a Technician
Error persists after water supply is confirmed and screen is cleaned — the water inlet valve solenoid needs replacement
Frequently Asked Questions
Common questions about GE C1 error
The C1 error on the GE GDT635HSMSS indicates the dishwasher is not receiving adequate water during the fill phase. Start by confirming the hot water supply valve under the sink is fully open and that the supply hose is not kinked. Cleaning the inlet screen at the dishwasher connection resolves this error in many cases.
Yes. GE dishwashers require a minimum water pressure of approximately 20 PSI to fill within the required time. If your home water pressure is borderline or if multiple water fixtures are running simultaneously, the dishwasher may not fill fast enough and will display C1. Measure your water pressure with an inexpensive gauge to rule this out.
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