What E:29 Means
E:29 is Bosch's undervoltage record: the machine has seen mains voltage below 85 volts in North America. The behaviour that goes with it is a dishwasher that takes far longer than usual, rinses and dries poorly, or simply stops part way. The only action in the chart is to check the house wiring connections, because the fault is on the supply side rather than inside the appliance.
Common Causes of E:29
- Loose connection in the branch circuit or at the junction box
- Undersized or overloaded circuit shared with other kitchen appliances
- Supply problem upstream of the house
🔧 One Safe Check You Can Try
Check whether the dishwasher shares a circuit with a disposer, a microwave or a countertop appliance, and whether the symptoms coincide with those running. Beyond that, measuring supply voltage under load is an electrician's job.
⚠ Why You Shouldn't Go Further Than That
- A loose connection carrying appliance current generates heat at the joint, which is a wiring hazard well beyond a slow wash cycle.
- The measurement that matters is taken while the machine is drawing current, not with a meter on an idle outlet.
- Nothing inside the dishwasher will fix this, so opening it spends effort in the wrong place entirely.
- Motors and heaters run on low voltage draw more current and get hotter, so ignoring this shortens the life of parts that were healthy.
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.