A:Answer Hi Jules, an oven will normally preheat in 12 - 15 minutes (+/-). Ovens with all racks in will preheat to 350°F in 12-15 minutes. If your oven is taking longer than that to pre-heat, please refer to the troubleshooting section of your Owner's Manual linked here: https://bit.ly/3xOPTmJ
If you are still having issues after trying the troubleshooting steps, please reach out to us directly via Facebook https://www.facebook.com/whirlpoolusa or Twitter @WhirlpoolCare so we may look into it further.