What E13 Means
U-Line's error table reads E13 as the unit not calling for water, and its error-code appendix gives the mechanism behind that: the float switch in the reservoir is not dropping quickly enough. U-Line also states what the code is for — detecting insufficient ice production caused by overheating or poor water quality. It is a water-and-yield problem, not a verdict on any one part.
Common Causes of E13
- High total dissolved solids in the supply water, which U-Line names directly as a cause of this error
- Condenser or toe kick blocked with debris, or a condenser fan not turning, so the machine runs hot and the ice never firms up
- Mineral buildup on the ice-making mechanism after long service on hard water
- A float switch that has begun to stick, which U-Line covers with a specific service part when ice returns solid after a power cycle
🔧 One Safe Check You Can Try
Start with what is coming out of the machine. U-Line ties this code first to slushy ice and falling ice quality, and its opening instruction is to inspect the condenser and the toe kick for debris and for a fan that is actually running — both visible without tools.
⚠ Why You Shouldn't Go Further Than That
- U-Line separates the two outcomes by what happens after a power cycle — ice that comes back solid points at the float switch, ice that stays slushy points at water quality or heat rejection — and treating the wrong one changes nothing.
- Where high TDS is the cause, U-Line is explicit that the water has to be sorted out before a repair is worth attempting; on a machine plumbed downstream of a water softener that can mean a plumber rather than an appliance technician.
- In the severe cases, where the machine runs up to an hour before logging the code, U-Line has the technician check compressor operation and auger rotation as well — that is a reading taken on a powered, moving assembly, not a homeowner inspection.
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.