The I30 error on your Frigidaire dishwasher means the control board has detected a water fill problem, usually linked to low water flow or a fault in the water inlet system. In most cases you can fix this yourself by checking the water supply and inlet valve before calling for service.

Error code I30
Meaning Water fill fault — the dishwasher isn’t detecting the correct water level or flow during fill
Severity Medium — the dishwasher usually won’t start a cycle until this is resolved
Time to fix 15–40 minutes
Tools needed Adjustable pliers, towel, flashlight

What the I30 error means

The I30 code shows up when the dishwasher’s electronic control senses that water isn’t filling the tub properly within the expected time. This can be due to low household water pressure, a blocked inlet valve, or a kinked supply line. It’s a fairly common code and doesn’t usually mean the control board itself is broken — it’s more often a plumbing or valve issue.

Common causes

  • Water supply valve under the sink is partially closed or turned off
  • Kinked, crimped, or twisted water inlet hose
  • Clogged or faulty water inlet valve
  • Debris or sediment blocking the inlet screen filter
  • Low household water pressure feeding the dishwasher
  • Float switch stuck or wiring connection loose

How to fix the I30 error

  1. Check the water shut-off valve: Look under the sink and make sure the valve supplying the dishwasher is fully open, not just cracked.
  2. Inspect the fill hose: Pull the dishwasher out slightly and check the water line for kinks, twists, or crimps that could restrict flow.
  3. Clean the inlet valve screen: Turn off the water supply, disconnect the hose at the valve, and remove any debris from the small mesh filter screen.
  4. Test the float switch: Open the dishwasher and gently lift the float in the tub to check it moves freely and isn’t stuck in the down or up position.
  5. Power cycle the dishwasher: Turn off power at the breaker for 5 minutes, then restart to see if the error clears once water flow is restored.
  6. Call a technician: If water flow is confirmed normal and the code persists, the inlet valve or control board may need professional replacement.

FAQ

Can I run the dishwasher with the I30 error showing?
No, most models won’t complete a cycle until the water fill fault clears, so it’s best to fix the cause first.

Is the I30 code expensive to fix?
Not usually. Most causes are simple issues like a closed valve or kinked hose, which cost nothing to fix. A replacement inlet valve is a low-cost part if needed.

Does low water pressure really trigger this code?
Yes. If the water pressure feeding your dishwasher is too low, the unit may not detect enough water flow within its fill window and will throw the I30 code.

For other appliance error codes, see Frigidaire EF Error Code: Causes and Fixes, Frigidaire CA Error Code: Causes and Fixes, Frigidaire CE Error Code: Causes and Fixes, Frigidaire EC Error Code: Causes and Fixes, and Maytag Washer F1 Error Code: Causes and Fixes.