JennAir Flush Mount Code E:27: continuous undervoltage under 170 V

What E:27 means

On the JennAir Flush Mount dishwasher for European cabinets, model JDB9600AW, E:27 signals a continuous undervoltage condition below 170 V. This is not a problem with the dishwasher itself. The control sees too little supply voltage and refuses to carry on. Owners see E:27 and the cycle halts or will not start, often when the home draws heavy power. Other devices on the same circuit may also seem to run poorly.

Common causes of E:27

Supply voltage at the outlet is too low
Loose connection in the household supply
Other large loads dragging down the circuit

✓ One safe check you can try

1. Switch the dishwasher off at the breaker and wait a minute. 2. Turn off other big loads on the same circuit and try again. 3. Check whether lights dim when the dishwasher starts. 4. Do not use extension cords. 5. If E:27 returns, have an electrician check the supply and call us if the unit still errors.

! Why to stop there

The cause usually lies in the house wiring, not the appliance.
Replacing parts in the dishwasher will not cure a weak supply.
Checking supply voltage safely takes a meter and training.
We quote in writing, and any repair we do is covered for 30 days.

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:27E:27 questions

Is my dishwasher broken if E:27 appears?

Probably not. The message says the supply voltage is the issue. If the voltage is corrected and the dishwasher runs normally, no repair is needed.

What voltage is the limit?

The control reports undervoltage below 170 V. A normal supply should be well above that, so a reading this low points to a wiring or utility issue.

Who should check the voltage?

A licensed electrician is the right person for house wiring. If you want, we will meet them and confirm the dishwasher behaves once the supply is stable.