E14
Winco
Control Circuit Fuse Failure
Controller displays E14 / CONTROL FUSE BLOWN or DC FUSE FAULT and the unit is dead or partially functional.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted control wiring, Failed relay coil, Incorrect replacement fuse rating, Shorted accessory (block heater, battery heater) on control circuit
How to Fix / Troubleshooting
Safety first: Disconnect battery negative and utility power before replacing fuses.
- Locate fuse: Open the control panel and find the DC control fuse or fuses as shown in the Winco wiring diagram.
- Inspect for shorts: Look for pinched wires, melted insulation, or loose terminals in the control harness.
- Replace with correct fuse: Install only the specified fuse type and rating. Never bypass with wire or a larger fuse.
- Test operation: Reconnect battery, restore power, and test. If the fuse blows again immediately, a shorted component such as a control relay or heater must be located and replaced.
Repeated fuse failures require systematic troubleshooting with a meter; consider professional service.
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Repair Difficulty
Medium
3/5
Required Part
Control Panel Fuse
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