I am having the same problem with my Dayton greenhouse thermostat, this question was posted in the wrong section...but if you find a solution I'd like to know. I am having problems with the heating thermostat as well as the cooling one.
SOURCE: Gaggenau wall oven
hi thanks for the question plus or minus 25 degrees is acceptable the heat will go past the set setting turn off and go below the set setting but the average temp is ok so there is nothing wrong thanks the appliance doc
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: Maytag oven needs temp calibration
Take your temp knob off and look in the center of the stem and you should find a small set screw. Using a small precision screwdriver, turn the screw until you see the light come on. (You won't have to turn it far.) Turn it a little at a time, maybe a 1/16 of a turn. Leave your thermometer in the oven with the door closed and at or near the temp probe that is in the oven. This way, you are getting a true reading.
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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