JennAir Older Range Code F04: Oven control or wiring problem

What F04 means

With older JennAir ranges including the JDR8895AAS, F04 is another electronic-oven-control code: the control or the wiring attached to it may have a problem. The oven stops its cycle, the display shows F04, and pressing keys may do nothing until power is cycled. This family of two-digit codes belongs to the earlier range generation, before the F-and-E codes took over.

Common causes of F04

Oven control board with an internal failure
Damaged or loose wiring to the control
Intermittent connection that acts up when the oven warms

✓ One safe check you can try

1. Cancel the cycle and let the range cool. 2. Turn the breaker off for a full minute and back on. 3. Press Cancel again and try a short bake. 4. Watch whether F04 appears during preheat or immediately, and tell us that detail when you call. Do not open the back panel to look at the wiring.

! Why to stop there

A control that repeats the code after a reset is not going to recover by itself.
Wiring checks need a meter and a safe way to power the range up.
You see the written price first, and the work carries a 30-day warranty.

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 Range codes

FEE7JennAir Range Code FEE7: Main cavity broil element Flashing Time, Clock, 12:00, Power Loss or Enter TimeJennAir Range Display "12:00" or "Power Loss": Set the Clock After an Outage Indicator FlashingJennAir Range Cooktop Indicator Flashing: Keys Pressed or Controls Set Wrong Indicator or Hot Light OnJennAir Range Hot Light On: A Control or Element Is Still Hot Lo or PreJennAir Range Display "Lo" or "Pre": The Oven Is Warming Up LockJennAir Range Cooktop Control Lock: Unlock to Use the Surface Locked, Lock or LocJennAir Range Oven Display "Locked", "Lock" or "Loc": Unlock Controls and Door Press Cancel to ResetJennAir Range Message "Press Cancel to Reset": Clear the Alert

F04F04 questions

Why does F04 sometimes appear only after the oven heats up?

Heat can make a weak connection or failing board part open up. That pattern points to the control or its wiring and is useful for us to know. Mention the timing when you book, because it tells us what to test first.

Should I replace the range?

Rarely. On a range with a control problem, a repair is usually far cheaper than replacement, and we quote it before starting. In many cases the control or wiring can be repaired while the range stays in your kitchen.

Is it safe to use the burners?

If they light and work normally, the cooktop is generally fine. Leave the oven off until it has been checked. If anything smells like gas on a gas range, leave the house and call the gas utility from outside.