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Why is my electric oven taking hours to preheat?

Why is my electric oven taking hours to preheat? My electric oven is taking over 2 hours to reach 300 degrees farenheit.

Asked by: Guest | Views: 184
Total answers/comments: 2
mcgyver89 [Entry]

"A not heating oven is the most common problem, the cause of this could be a burned fuse or a faulty relay board. There are cases where the main control board may be the reason for a not heating oven. If it is a gas oven most of the time the problem is with the igniter.

Igniter: The igniter is responsible for most of the problems for ovens not heating. Watch the igniter when the oven is on. If the igniter glows for more than 1 minute without igniting the gas into a flame it mostly likely means the igniter is too weak to open the safety valve and probably needs replacement. If there is no glow at all the igniter can be tested with a multimeter and replaced in necessary.

Bake and Broil Elements: The bake and broil elements should be able to glow a red hot. If it can't the oven will not heat properly. Inspect the elements for cracks and holes. They can be tested with a multimeter for continuity.

Spark Electrode: The spark electrode ignites gas for baking and broiling purposes. It sits next to the burner. You can inspect the porcelain housing and the tip of the electrode for damage. Pro Tip: A proper ground and correct polarity of the incoming voltage is required for the spark electrode to function correctly so these need to be checked to as a possible source of the problem."
mcgyver89 [Entry]

"Hi @cwimpelberg,

According to this supplier of parts for the range, the manufacturer’s tech sheet part number is 316905209.

Here’s the tech sheet

It shows how to calibrate and adjust the temperature of the oven but you may also need to measure the oven probe -part #37 body diagram (temperature sensor) resistance values at the test points on the display pcb with an Ohmmeter and compare them against the temperatures in the chart in the tech sheet to see if it is OK or not"