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The internal foam may have pushed the sensing bulb tube to close to the external wall, not sensing the temp as well. The freezer is having to get too cold before bulb senses to turn off. On the thermostat itself, there may be a set screw that you can adjust one round opposite the colder arrow beside the screw. Then see if that helps, if getting closer, but still off, adjust accordingly, until you are satisfied. If that does not work, there is really not much more that can be done in that situation. If this information has assisted you, please give a good to great rating....Thank you
Thanks, XXXXX XXXXX that set screw. Do you know if it's a temp calibration adjustment screw or a temp differential adjustment screw. Also, do you know which way I should turn it (clockwise or counterclockwise) to: XXXXX XXXXX the temperature if it's for temp calibration, or 2. reduce the differential if it adjusts that. If that doesn't do the trick I think I'll try to remount the probe bulb onto the inside of the freezer skin (in a 1/4" copper tube) & see what happens. Thanks again,
One more question. I first remounted the thermostat bulb so it was 12" into the freezer compartment itself. I then tried recalibrating the cold control with the screw by turning off the freezer & waiting until it reached exactly 0-degrees, then turned it back on and adjusted the screw until the compressor turned off. The compressor restarted at around +2-degrees, but continues to run even though the temp is now down to -17 degrees. Any idea as to what is wrong with the thing?
Sorry, it doesn't seem like you're actually reading my questions before you answer them. I did "go thru the cabinet" and run the probe directly inside as I'd already stated, and I did "buy a new one (thermostat)" as I also already stated. Yes, please open the question to others & see if any ideas pop up.
No answer so far. I did ask the previous professional to open the question to others.
Thanks for the response. I'm actually using an Accurite electronic refrigerator/freezer thermometer with two wireless sensors. I put both inside the same freezer: one between packages that are long-frozen (the freezer is 2/3 full) and the other nearer the thermostat bulb that's now exposed in the freezer compartment. Both read within 1-2 degrees of each other. The Accurite also records max & min temps, so I can see how big the temp swings are in the freezer, which are also about the same for both sensors. I also have a dial-type analog thermometer which also always reads pretty-much what the digital ones read, so I'm quite sure the freezer is truly experiencing wide temp swings. It's been doing it for months or more, I probably just didn't realize it until I put the electronic recording thermometers in. As I said before, it runs continually until the temp hits minus 15-18 degrees, finally shuts off, and won't turn on again until the temp is around 0 degrees, then repeats the same 15-18 degree temp swing all over again. Using the same two sensors in similar positions in our other chest freezer shows a temp swing of 2 degrees at most, confirming my suspicion that the thermometers aren't the issue. Replacing the cold control and moving the sensor bulb into the compartment itself had no effect. I'm stumped. There are only a few components in the darn thing, thermostat, relay, and compressor, and I feel like an idiot for not being able to troubleshoot it. My only other guess is a low Freon condition leading to uneven evaporator coil cooling causing uneven temps inside, but that doesn't make a lot of sense though. And I don't think inexpensive freezers even have a compressor time-out device to prevent damage from power glitches. Anyway, thanks for the help. It looks like I'm going to have to give up on the thing, and I hate giving up.
Thanks for responding so quickly. As to your question: no, there's even frost on the back, front, and right-hand walls, but none on the left, which is where where the thermostat bulb was originally mounted inside. The repositioned bulb is now in the compartment itself, an inch or so from the left wall, but not touching it. Maybe I'll try moving it so it's farther away from the wall & see what happens.
Sorry I forgot to reply. I did move the now fully exposed bulb around in the freezer compartment. No improvement. Bought new freezer identical to this one. Temp swings in this one are about 2-degrees. So I think I'm giving up!