The digital temp setting will not hold less than 39 degrees for long.
That is, I can set the temp to a lower setting, but later when i look to check, say, several hours later, the refrigerator setting has returned to the 39 degree setting. Am I doing something wrong? I bought the box used, 3.5 years old and it seems fine in every way. The freezer holds zero just fine. I checked the temperatures with a laser infrared gun. I'd like to get the refrigerator temp to the factory recommended 37 degrees or maybe a little colder. Thank you.
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Well, your temp sensors can still be bad. If not, there's always a new control board you buy!
However, I wouldn't drink water from that oasis without making ABSOLUTELY sure I'm not seeing a mirage.
The only common denominators between your upper and lower oven temp readings is the firmware and the oven thermometer you are using to visually check the temps.
What type of thermometer are you using to check your oven temperatures with?
If it's not a digital thermometer used specifically for testing ovens, you might just be leading leading yourself astray.
You need a calibrated thermometer. If I don't have a calibrated digital thermometer on me, I use two or three oven thermometers (the dial type) and average the readings.
It's the only way to be as close as possible with a digital probe.
If you have thoroughly verified that your oven is in fact not reading the correct temperature, then you can adjust it +/- 35 degrees F via your oven's control panel.
To adjust the oven temperature:
1 - Press Setup pad.
2 - Select the down arrow to scroll to the next screen.
3 - Select Temp Adjust using the Quickset pads.
4 - Select upper or lower oven (select models).
-"Set temperature offset using the Upper Set Knob" is displayed.
5 - Enter the desired temperature change using the Set knob.
The temperature can be increased or decreased up to 35 degrees.
The temp. change is displayed at the top of the window.
6 - Press the Set knob to accept the change.
Now, if you are still worried about the temp. reading being off, replace both the upper and lower temp sensors. That's all you can do besides replace the main board.
First of all, most oven thermometers move very slowly compared to the electronic sensors and controls on the oven. To make sure you are getting an accurate reading, the thermometer should be in the center of the oven, the oven should be preheated, then wait another 20 minutes after the preheat beep. If the temperature is less than 35 degrees higher or lower at this point, it can be adjusted via the controls. Usually on GE ovens you press and hold bake and broil at the same time until SF comes up in the display. Then press bake, then use the arrow keys to raise or lower the temperature setting. If the temperature is more than 35 degrees off, you may have a bad sensor, bad control board, or other problem.
Generally the oven temperature will fluctuate as much as 30 degrees above or below the set temperature. The longer the oven is on, the less the temperature fluctuates. If you measure the highest and lowest temperatures readings with a thermometer after the oven has been preheated at least 20 minutes, you should come up with an average temperature somewhere within about 10 degrees of the set temperature. You can calibrate most ovens up to 35 degrees higher or lower if it is off. Any more than that requires replacing parts.
You say you had it checked, did the shop say everything was fine ? Usually the climate control will not go below 60 degrees. You check the performance by using a thermometer in the vent. Inside air temp coming out the vent should be at least 20 degrees less than outside air temp.
more than likely there is an issue with one of the temp sensors. you will need to press and hold clear then upper on off at the same time then release them then immed. press clear 3 times and hold on the 3rd till the service screen appears. on the right side you will see internal temp and catalyst temp they should be equal or very close. ill bet one of them is alot higher than the other if so the sensor will need replace but depends which one is bad as there are 2 of them. if the problem is on the lower just repeat above but use lower instead of upper
To manually operate the thermostat set the system to cool and fan to auto then press the HOLD button one time then release, you will see the hold word on the screen after that up the UP or DOWN arrows is setting the desired temperature.