SOURCE: Bosch HBN 642 -- single oven cycles and doesn't get above 325
WHAT WAS HAPPENING AT 1ST YOUR HI-LIMIT TERMAL SAFETY OR OVEN TEMP SENSOR FELT THAT THE OVEN WAS GET TOO HOT AND SEIZING OPERATION UNTIL SAFE TEMP WERE OBTAINED THIS IS GENERALLY A FAULTY OVEN TEMP SENSOR. I WOULD ADVISE YOU TO CONTACT A CERTIFIED TECH TO LOOK AT IT AND P.S. DON'T MENTION THAT YOU TOOK THE MACHINE APART MOST SERVICE COMPANIES WILL NOT SERVICE THE MACHINE IF IT BEEN TAMPER WITH BY THE CUSTOMER DUE TO INSURANCE AND LIABILITIES
If you need further help, reach me via phone at https://www.6ya.com/expert/marlon_56d9a24f02585258
SOURCE: Oven temperature only gets to within 20-25 degrees of temp. set
next to last page in your manual
Adjusting Oven Temperature
Oven temperature has been factory calibrated and tested. If
oven consistently over or under cooks food, adjust thermostat.
Oven temperature can be increased or decreased 35°F. To
avoid over adjusting oven, move temperature 5°F each time.
1. Push BAKE pad.
2. Press + pad until an oven temperature greater than 500°F
shows in display.
3. Immediately push and hold, approximately 5 seconds,
BAKE button until “00” appears.
4. Press + or - arrow pad to adjust oven temperature.
• To increase oven temperature (for a hotter oven), Press
pad until a positive number appears in display.
• To decrease oven temperature (for a cooler oven),
Press pad until a negative number appears in display.
5. Press OVEN CANCEL pad to save adjustment.
• Setting is saved if power fails or is disconnected.
heres a link to the entire manual if needed
http://shop.amana.com/assets/pdfs/literature/32103601.PDF
SOURCE: Fixing thermostat on oIder Hotpoint Double Oven
Hello, there is no fixing the thermostat although some of the older thermostats could be calibrated by using a very small flat head screwdriver in the shaft of the thermostat if there is no opening for a tiny screwdriver in the shaft then it cannot be calibrated. If you have to change the thermostat contact your local parts department have the model # handy if the original is not available ask about universal oven control replacement parts. Good Luck
SOURCE: Need wiring diagram for old 1960's General Electric Wall Oven
Hopefully this will help. Don't know if it is the same model, but it is a 60s GE built in oven.
SOURCE: New replacement thermostat needs calibrating on my Kenmore oven
There is no real way to calibrate the thermostat. Most ovens have the same problem. By lowering the setting slightly will help get a closer temperature. Sometimes similar thermostats are substituted and may not be exactly the same as the original that came with your oven. Hope my trying to answer your question was helpful, Thanks, Sea breeze
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