Viking Dishwasher Code E:03: heater problem

What E:03 means

On current Viking VDWU and FDWU dishwashers in the 324, 524 and 724 series, E:03 is a heater error shown on the program indicator. The machine could not heat water or air as the cycle needs. Wash and dry results suffer: dishes may come out cooler and wetter than normal, and the cycle may stop with the E:03 icon on.

Common causes of E:03

Heater not working
Heater connection loose or open
Control not powering the heater

✓ One safe check you can try

1. Switch the dishwasher off at the breaker for a minute, then back on. 2. Run a short cycle and see whether E:03 returns. 3. After the cycle, feel the inside of the door; it should be warm if heating worked. 4. If E:03 returns, stop using the machine and call us. Heater testing is not an owner job.

! Why to stop there

Heating parts need to be tested with a meter on a live circuit
The control and heater can show the same code
We quote the price in writing before we start, and offer a 30-day warranty

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dishwasher codes

High Level ErrorViking Built-In Dishwasher Code High Level Error (2-4): water level above limit Temperature Sensor ErrorViking Built-In Dishwasher Code Temperature Sensor Error (4-1): water temperature sensing problem Inlet Valve ErrorViking Built-In Dishwasher Code Inlet Valve Error (4-4): fill valve reported User Interface Communication ErrorViking Built-In Dishwasher Code User Interface Communication Error (3-1): panel not talking to main control Internal ErrorViking Built-In Dishwasher Code Internal Error (5-5): control reported its own problem Wash Heater ErrorViking Built-In Dishwasher Code Wash Heater Error (4-2): wash heater problem Light China FlashingViking Designer Dishwasher Code Light China Flashing: problem at the water inlet Low Level ErrorViking Built-In Dishwasher Code Low Level Error (2-3): water level sensor reading low

E:03E:03 questions

What does the heater do in a dishwasher?

It warms the wash water and helps dry the load. When it fails, dishes may not clean well, and the drying phase leaves moisture behind.

Can hard water cause E:03?

Heavy scale can affect a heater over time, but the code itself only says the heater has a problem. We confirm the real cause before recommending a part.

Is it safe to run another cycle?

One reset is fine. If E:03 comes back, stop. A heater problem can mean overheating or no heat, and either one is best checked before more use.