On a Thermador dishwasher, E15 points to the Aquastop leak-protection system. Moisture has pooled in the base tray and floated the safety switch, which halts the wash program and runs the drain pump to keep water away from the cabinetry underneath. Thermador Sapphire, Emerald, and Star-Sapphire units sit on the BSH platform, so the same trigger applies across those lines.
Clearing E15 is not really about the float. A technician traces where the water entered, whether that is a split circulation hose, a tired sump gasket, or a spray-arm seal, renews that component, dries the tray, and only then clears the protection so it does not resurface on the next fill.
Symptom and Error Guide
| Code / Symptom | What It Means | What We Do |
|---|---|---|
E15 | Aquastop tripped, water pooled in the tray | Trace the entry point, renew the part, dry and clear |
E24 | Water will not drain out | Check the filter basket, hose loop, and pump impeller |
E22 | Fine filter or non-return valve blocked | Rinse the filter stack, verify the check valve |
What We Check
- Standing water sitting in the base tray after the shutdown
- Circulation and drain hoses at every clamp and joint
- The sump gasket and lower door seal for weeping
- Float-switch travel once the tray has been dried out
Because E15 is a deliberate safeguard, the machine is protecting your floor and its own base electronics. Booking service promptly means the real leak gets sealed rather than the code simply wiped, which only buys time until the next cycle runs.
Want This Handled by a Technician?
Book online or call during confirmed business hours. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
When to Call a Technician
When the source sits behind the sump, inside the door assembly, or on the control board, or when the code returns after a reset, hand it to a technician. We cover North Stamford and the surrounding Greenwich–Lower Fairfield service corridor and Greenwich and Lower Fairfield County towns with Genuine OEM Parts and a warranty backing every job.