What F86 Means
F86 means the dishwasher is overfilling or underfilling inconsistently from cycle to cycle, rather than failing the same way every time.
Common Causes of F86
- Intermittently failing fill-level sensor
- Water inlet valve not seating consistently
- Household water pressure fluctuating enough to affect fill timing
🔧 One Safe Check You Can Try
Note whether the amount of water in the tub looks visibly different between cycles — that inconsistency is useful information for a technician narrowing down a sensor versus valve cause.
⚠ Why You Shouldn't Go Further Than That
- An inconsistent, intermittent fault is inherently harder to catch and diagnose than one that fails the same way every time, and needs to be observed under test conditions.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.