What E24 Means
JennAir's E24 page states the oven reached an overheat condition of 500F, which is 260C, and names the thermal sensor, the gas sensor, the appliance control board, or the associated wiring. An appliance reporting a measured overheat is in a different class from one reporting a sensor it cannot read.
Common Causes of E24
- A thermal sensor misreporting temperature
- A control board that failed to switch the heating off at the set point
- A sensing circuit problem letting the cavity run past its limit
🔧 One Safe Check You Can Try
Put the appliance out of use and isolate it at the breaker. What JennAir's page reports is a measured overheat, and there is no home test that makes that safe to repeat.
⚠ Why You Shouldn't Go Further Than That
- A control that has allowed a measured overheat has to be proved safe before the appliance is used again, and that is not something a reset establishes.
- If a relay has welded closed, heating can continue in ways the front panel does not reflect - a scenario a technician checks for deliberately.
- The section involved sits alongside the high-voltage capacitor, so even the inspection is not an unsupervised job.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.
Technical Reference
- Code
- E24
- Appliance
- JennAir microwave
- Maker documentation
- JennAir owner manuals and use & care guides
- Checked
- September 2026
Code meanings can change between control generations. Before acting on a code, match the full model number on your appliance's rating label against the manual for that model. We are an independent repair service, not affiliated with Whirlpool Corporation.