Bosch Dishwasher E:13 (incoming water too hot)

What E:13 means

E:13 does not interrupt your wash. It is a logged entry, normally found when a technician reads the problem memory, showing that water reached the dishwasher hotter than 75 C (167 F), which is the most Bosch allows. The fix on record is simple: turn the home water heater down to a temperature within the range your manual gives.

Common causes of E:13

Home water heater turned up past the dishwasher's inlet limit
Heater thermostat failing and overshooting its setting
Hot-water recirculation loop feeding the kitchen hotter than normal

✓ One safe check you can try

1. Find the thermostat on your water heater. 2. Read the setting. Anything much over 140 degrees Fahrenheit is more than a dishwasher needs. 3. Turn it down a notch and give it a few hours. 4. Water that hot also scalds at the tap, so lowering it helps there too.

! Why to stop there

A water heater thermostat sits behind panels with live wiring, so adjusting it incorrectly is a safety matter.
Hot water that high can warp plastic parts and degrade seals inside the dishwasher over time.
A failed heater thermostat needs a plumber, not an appliance repair.

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.

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Other Dishwasher codes

E:30Bosch Dishwasher E:30, voltage too high and the machine shut down E:31Water in the zeolite container - Bosch Dishwasher E:31 FBosch Dishwasher F on an older display (water filling) 2HBosch Dishwasher 2H: Long Cycle Warning on Older Displays 1Bosch Dishwasher Service Test Result 1: Aqua Sensor 2Bosch Dishwasher Service Test Result 2: Heating Group 4Bosch Dishwasher Service Test Result 4: Water Filling 8Bosch Dishwasher Service Test Result 8: Temperature Sensor

E:13E:13 questions

Can hot supply water damage my dishwasher?

Prolonged exposure above the limit can age hoses and plastic parts. E:13 is a heads-up rather than a failure, which is why lowering the heater setting is the sensible response.

Will lowering the heater make dishes less clean?

No. The dishwasher heats the wash water itself to the temperature each program needs, so a supply around 120 degrees Fahrenheit is plenty for it.

Is this a warranty matter?

It is a household setting, so it is generally not covered. We can confirm the inlet temperature on a visit, and you receive a written price before any work is done.