Problems Preheating Amana Oven
I moved into a house that has an Amana 'The Big Oven - Capacity 5.14'. The model number is ACF4225AB. The year on the label of the stove states that it passed inspection in 2001.
I am having problems with the oven reaching the proper temperature in a reasonable amount of time. This is the test I performed with an oven thermometer. I set the oven temperature to 350 degrees.
After 11 minutes the preheat light turned off. The temperature was less than 200 degrees.
At 15 minutes the temp was 250 degrees.
At 20 minutes the temp was 290 degrees
At 30 minutes the temp was 325 degrees
At 35 minutes the temp was only 340 degrees.
I ran out of time and had to stop the test at this point.
I know preheat in ovens that have the baking element covered should usually take between 10-20 minutes, so this seems a bit unreasonable.
I removed power to the oven and tested the resistance of the bake and broiler elements using an ohmmeter as recommended in the Amana Technical Information – Component Testing Procedures. Both the bake element and broiler element had the correct resistance 20 ohms and 19 ohms, respectively. I also tested the voltage across the bake and broiler elements, when the oven is first turned on and the voltage is 240 V.
I also tested the resistance of the Oven temperature sensor with an ohmmeter. The resistance was 1100 ohms at room temperature. So it also looks like it is within spec.
What does the control limit switch do? I have tested it and it always appears to be in the closed position even after the oven has reached 235 degrees?
Do you have any idea what is wrong with my oven? Why does preheat turn off before the oven is up to temperature? Is it the Electronic Range Control? Or the control limit switch?
Are there any other tests that I can perform to determine the part that is failing? Does anyone have a schematic of the electronic range control?
Any help would definitely be appreciated – thank you in advance.
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