What 3 Flashes Means
Three flashes every five seconds is a sensor open or shorted, but Viking's own wording here is ambiguous: the VUIM/DUIM150 service manual (2009, page 30) prints "bin sensor open or shorted" against both the two-flash and the three-flash rows, while reserving "bin and evaporator sensor" for four flashes. Read alongside the other two rows, three flashes most plausibly identifies the evaporator sensor on its own, but the manual as printed does not say so and we will not claim it does.
Common Causes of 3 Flashes
- Evaporator thermistor open or shorted
- Bin thermistor open or shorted
- Thermistor lead damaged where it passes out of the back of the cabinet
- Connector unplugged at the electronic control
🔧 One Safe Check You Can Try
Count the flashes carefully and write the number down, because this is the one row on the chart where the printed text does not line up with the rest and a technician will want your count rather than a description.
⚠ Why You Shouldn't Go Further Than That
- The evaporator thermistor is secured against the evaporator plate bracket, and Viking's own note is that a thermistor without proper and secure contact reports a temperature the plate is not at.
- Removing the evaporator thermistor means draining the reservoir, taking out the cutter grid, the ice deflector and the reservoir itself before the sensor is even reachable.
- Because the printed meaning of this row is ambiguous, a repair based on the manual text alone can replace the wrong one of two sensors.
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.