Oven heats but does not reach set temperature or takes excessively long to preheat.

Safety first: Use caution when working around hot surfaces. Turn off power before testing components.

Step-by-step checks:

• Verify temperature: Use an oven thermometer placed in the center of the oven. Compare actual temperature to the set temperature after a 20–30 minute preheat.
• Inspect elements: Ensure both bake and broil elements glow evenly when heating. Dark spots or uneven glow can indicate a failing element; replace as needed.
• Check door gasket: Inspect the door seal for gaps, tears, or flattening. Close the door on a sheet of paper; you should feel resistance when pulling it out. Replace the gasket if loose.
• Sensor test: Test the oven temperature sensor resistance at room temperature (~1050–1100 Ω). Replace if out of spec.
• Calibrate control: Many Amana ovens allow temperature calibration (offset) in the settings menu (e.g., +/- 30°F). Follow the user manual to adjust if the oven is consistently off by the same amount.