JennAir Flush-Mount Code E:04: Heater not operating, power module warning

What E:04 means

The JennAir flush-mount dishwasher for European cabinets, for example the JDB9600AW, shows E:04 when the power module reports a problem and the machine runs without its heater. The listed causes are a ground leak at the zeolite heater or a failed safety relay for the heater. Dishes come out wet or cool-washed. Early units may also have logged E:04 once during the first eight wash cycles without any real defect.

Common causes of E:04

Ground leak at the zeolite heater
Safety relay for the heater failed on the power module
Single stored E:04 from the first eight wash cycles of a new unit, with no defect behind it

✓ One safe check you can try

1. If the machine is brand new and E:04 appeared once, run a few more normal programs and see whether it returns. 2. Power the unit down at the breaker, wait sixty seconds, and bring it back on. 3. Check the water supply tap is fully open. 4. If E:04 shows again after several programs, leave the heater alone and call us. Do not open the lower panel yourself.

! Why to stop there

A ground leak means electricity is escaping where it should not, which is a safety matter.
Heater and relay are tested with the power applied, which is not safe for owners.
Running repeated programs on a suspect heater circuit can trip the home breaker.
We separate the harmless first-cycle entry from a real failure in one visit and quote before replacing anything.

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:04E:04 questions

Is E:04 on a new dishwasher a defect?

Not always. Early units are noted as possibly storing E:04 once during the first eight wash cycles with no real problem. If it never repeats, the machine is fine. If it repeats, call us.

Can I keep using the machine?

The program runs without heat, so results are poor and drying is weak. Because a ground leak is one of the listed causes, we do not recommend running it repeatedly until it has been checked.

What does the repair involve?

We check the heater circuit and the safety relay, tell you which one has failed, and give you a written price first. Work is covered by our 30-day workmanship warranty.