JennAir Flush-Mount Code E:21: Heat pump blocked

What E:21 means

On the JennAir flush-mount dishwasher for European cabinets, for example the JDB9600AW, E:21 is a circulation pump message. The heat pump is blocked, and the program ends early. The thing to look for is a foreign object stuck in the pump area, and the pump is replaced if clearing it does not help. You will find dishes only partly washed and a display reading E:21.

Common causes of E:21

Foreign object such as glass, a bone or a label blocking the heat pump
Heat pump damaged by the blockage
Filter system clogged so debris reaches the pump

✓ One safe check you can try

1. Give the machine a one-minute power rest at the breaker panel. 2. Open the door and lift out the lower rack. 3. Take out the filter and clean it under running water. 4. Look in the sump area for broken glass or small objects you can remove by hand, with care. 5. Replace the filter and run a rinse program. If E:21 returns, call us.

! Why to stop there

Broken glass in the sump can cut hands.
The pump housing is not reached without removing the lower tub parts.
Forcing a blocked pump can crack its housing and cost more to fix.
We remove the object, check the pump and give a written price first.

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

F8E4JennAir Dishwasher Code F8E4: Check for water and leaks after installation F8E5JennAir Dishwasher Code F8E5: Fill valve stuck open F9E1JennAir Dishwasher Code F9E1: Long drain time F9E2JennAir Dishwasher Code F9E2: Drain motor error FAE4 or F10E4JennAir Dishwasher Code FAE4 or F10E4: Diverter valve error FAE5 or F10E5JennAir Dishwasher Code FAE5 or F10E5: Diverter leak H2OJennAir Dishwasher Code H2O: Not detecting water Sanitize Light FlashingJennAir Dishwasher Message "Sanitize Light Flashing": Sanitize Temperature Not Met

E:21E:21 questions

What counts as a foreign object?

Typical finds are shards of glass, fruit pits, bones, toothpicks and paper labels. Anything small enough to pass the filter can lodge in the pump and stop it from turning.

Does a clean filter solve E:21?

Sometimes. If the blockage was just debris in the filter, yes. But if the pump itself is jammed, the code stays until we clear it or replace the pump.

How long does the repair take?

Usually one visit. We clear the pump, test it, tell you whether it needs replacing, and give you a written price before starting. The work has a 30-day warranty.