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Post by flyspray on Oct 8, 2023 22:51:28 GMT
I jus bought a CK. Pugged it in and it runs all time even when I turn it down to 1. In a few hours freezer went down to 5 below zero a and bottom shelf is 20*. I suppose thermostat is bad. Is there a replacement or maybe something else I can check?
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Post by ckfan on Oct 9, 2023 15:56:00 GMT
Hi there. Yes, it sounds like something is causing the thermostat to not break the circuit to the compressor. The compressor and refrigerant system itself sounds healthy though, or else it wouldn’t be able to pull down that low.
One simple thing to check is to make sure that the sensing bulb for the thermostat is in the correct place and is firmly clamped to the evaporator mounting point. It should be on the left side of the evaporator towards the front. Check that first to make sure it is clamped correctly. I believe the scotch yoke manual which covers your machine should have a section which talks about this. The manual is free for download in this section.
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Post by flyspray on Oct 9, 2023 18:33:33 GMT
Hi there. Yes, it sounds like something is causing the thermostat to not break the circuit to the compressor. The compressor and refrigerant system itself sounds healthy though, or else it wouldn’t be able to pull down that low. One simple thing to check is to make sure that the sensing bulb for the thermostat is in the correct place and is firmly clamped to the evaporator mounting point. It should be on the left side of the evaporator towards the front. Check that first to make sure it is clamped correctly. I believe the scotch yoke manual which covers your machine should have a section which talks about this. The manual is free for download in this section. I took thermostat out and removed electric connection and the bulb. the parts loose were inside and one of then is a contact. It is very corroded and probably wasn't making or else it was stuck. I think that might be the problem. Looks like the side is supposed to come off but I'm afraid to pry too hard. If I can get that side off I can probably get it back and clean up the contacts. Any suggestions? ![]()  |
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Post by flyspray on Oct 9, 2023 18:51:22 GMT
This part of a sticker inside the door couldn't have been there since new, could it? Is it something reproduced? Attachments:
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Post by joneske on Oct 9, 2023 19:57:58 GMT
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Post by flyspray on Oct 9, 2023 23:30:42 GMT
I got the side cover off thanks to a video here. I can't find a place for that square nut that came out when I took the bellows off. The picture in the video isn't good enough to tell for sure but I don't think it belongs in there.
Found where the square nut goes. Now that fiber washer that the bellows sits on, my washer is plastic and has a tit that the bellows sits on, does this seem right? That bellows is real tight. How can I check if it is good?
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Post by turbokinetic on Oct 10, 2023 14:22:05 GMT
I got the side cover off thanks to a video here. I can't find a place for that square nut that came out when I took the bellows off. The picture in the video isn't good enough to tell for sure but I don't think it belongs in there. Found where the square nut goes. Now that fiber washer that the bellows sits on, my washer is plastic and has a tit that the bellows sits on, does this seem right? That bellows is real tight. How can I check if it is good? Hi there. It's unfortunate that you removed the bellows from the thermostat. That allows it to over-expand. You will need to place the bellows in the freezer and then use your thumb to re-compress it while it is cold. That is going to allow it to work again, but it will require calibration. The contact parts which came out shouldn't need to be removed. I think probably the square part is a spacer which goes in the contact arrangement. Will have to look at a control and try to determine where that part goes. The plastic washer is correct, as well. In my videos, you have seen me remove bellows without freezing them but those were already flat and had no pressure remaining. If the bellows is still charged it is not to be removed. Sincerely, David |
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Post by flyspray on Oct 10, 2023 18:37:49 GMT
I got the side cover off thanks to a video here. I can't find a place for that square nut that came out when I took the bellows off. The picture in the video isn't good enough to tell for sure but I don't think it belongs in there. Found where the square nut goes. Now that fiber washer that the bellows sits on, my washer is plastic and has a tit that the bellows sits on, does this seem right? That bellows is real tight. How can I check if it is good? Hi there. It's unfortunate that you removed the bellows from the thermostat. That allows it to over-expand. You will need to place the bellows in the freezer and then use your thumb to re-compress it while it is cold. That is going to allow it to work again, but it will require calibration. The contact parts which came out shouldn't need to be removed. I think probably the square part is a spacer which goes in the contact arrangement. Will have to look at a control and try to determine where that part goes. The plastic washer is correct, as well. In my videos, you have seen me remove bellows without freezing them but those were already flat and had no pressure remaining. If the bellows is still charged it is not to be removed. Sincerely, David |
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Post by flyspray on Oct 10, 2023 18:47:45 GMT
I got thermostat all back together and it still runs all time just like it did when I brought it home. It is getting good and cold. What are my options now? I put the bellows in freezer like you said and it was easy to put back in.
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Post by turbokinetic on Oct 10, 2023 19:32:01 GMT
I got thermostat all back together and it still runs all time just like it did when I brought it home. It is getting good and cold. What are my options now? I put the bellows in freezer like you said and it was easy to put back in. What you will need to do is remove the temperature adjustment knob from the control. Once that knob is removed you can freely rotate the adjustment stem to a warmer setting. Be careful because the stem itself is electrically live when the knob is removed. I would let the machine run for several hours until it is as cold as it will get. Do not open the fridge cabinet door. Unplug the fridge and remove the screw in the middle of the temperature knob. With the knob removed, gradually rotate the stem in the warmer direction until you hear the control click off. Once you have reached this state, reinstall the knob with the pointer pointing to the coldest position on the dial. Reinstall the screw and plug the fridge back in. See if this will get it cycling properly. I have a video explaining this but I do not have my computer available at the moment to share a link. I will try to share a link later when I get a chance. |
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Post by flyspray on Oct 10, 2023 19:58:21 GMT
Will 3 hours be long enough? I will try that and let you know. My hearing isn't too good not sure I could hear the click. If I leave it running and use insulated plyers to rotate would compressor cut off?
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Post by flyspray on Oct 10, 2023 23:15:09 GMT
It works at least somewhat. I turned the dial back down till it cut off just under 4. I then turned it up to 6 and it restarted. Now I turned back to just under 4 it stopped again and now I am leaving it alone to see what it will do.
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Post by turbokinetic on Oct 11, 2023 0:40:05 GMT
Glad it seems to be working. Yes use insulated pliers, or the knob its self, to adjust with power on.
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Post by flyspray on Oct 11, 2023 14:49:12 GMT
I shut all down last night. This morning it won't come on. I took thermostat out and the contacts aren't closing when I turn the dial to colder. What now?
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Post by turbokinetic on Oct 11, 2023 14:54:24 GMT
I shut all down last night. This morning it won't come on. I took thermostat out and the contacts aren't closing when I turn the dial to colder. What now? There could be a loss of pressure in the thermostat bellows. That is one of the only reasons the contacts won't close. Can you see or feel that the pressure is still on the bellows when the thermostat cover is off? |
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