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Oven thermostat

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Premium Member
Dec 1, 2006
Honesdale Pa
Model Number
6-10 years
Can someone tell me what is an acceptable differential for an oven thermostat?? How many degrees from cycle on to cycle off after oven temp stablizes.


Appliance Tech - Moderator
Staff member
Oct 10, 2004
Ontario, Canada

Can someone tell me what is an acceptable differential for an oven thermostat??

Depends on whom you talk to!
GE says 75-100º swing is fine, most manufactures go for 50º swing....I like to see 25º each way.
EG: Set oven for 350ºF and it will heat up above 350 and shut off at 375....cools down to 325 and comes back on, but the average or mean temp is 350º.
If you read the oven temp on a thermometer, first couple of cycles will be way off until the liner and racks get up to temp and then it should level out.
To Test Oven Temperature
1. Place the weighted thermocouple probe in the center of the oven cavity, centered from front to back, top to bottom, and side to side.
2. Program the control for bake at a temperature setting of 350 degrees F.
3. Allow the oven to heat for at least 15 minutes or until the high and low temperature readings stabilize and become consistent.
Overshooting of the oven temperature occurs on the first cycle of the control because components have not reached operating temperature. Two (2) or three (3) full cycles are required before beginning a check of the oven temperature.
4. Calculate the average oven temperature. Add the high and low temperature reading peaks together and then divide by two (2).
High Peak = 375
Low Peak = 325'
375 plus 325 = 700
700 divided by 2 = 350
Average oven temperature = 350'
Several readings should be taken to provide an accurate indication.
If the average oven temperature does not correspond to 350 degrees F., then Adjust the oven thermostat.
To Weight The Thermocouple:
A thermocouple can be weighted in one of two ways:
Two (2) one‑inch (1") squares of 1/16" thick aluminum can be clamped to the thermocouple tip.
A 5" x 8" piece of aluminum foil can attached to the thermocouple tip.
To Attach the Aluminum Foil:
Fold the foil five (5) times, doubling the thickness with each fold.
Place the thermocouple tip in the center of the aluminum piece and fold once more.
Fold the sides so that the foil clings to the thermocouple tip.


If needed:

Oven-Thermostat-WB20K10004--00825718.jpg LINK> Thermostat, oven

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