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Post by 1966novacoupe on Mar 5, 2022 16:56:38 GMT
yesterday i defrosted my m.t. which includes heating up the evaporator just a bit [ warm to the touch ] now im not getting any refrigerant circulating thru the evaporator. worked great up until the defrost. could the float be stuck? how can i tell? and how do i un stick it? thanks so much for any info.
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Post by turbokinetic on Mar 6, 2022 12:52:21 GMT
yesterday i defrosted my m.t. which includes heating up the evaporator just a bit [ warm to the touch ] now im not getting any refrigerant circulating thru the evaporator. worked great up until the defrost. could the float be stuck? how can i tell? and how do i un stick it? thanks so much for any info. I'm feeling like this is your CK-1-D16 that you've talked about previously? Correct me if I'm wrong. Normally, the float seems to stick (or plug) if the unit is sitting for a long time without operating. Just an overnight defrost wouldn't do it. Have you tried tapping sideways on the needle and seat area? Do you hear any abnormal sounds from the compressor? Extra rattling or louder operation? If there is not enough refrigerant in the system it can cause this problem. You would likely smell SO2 leaking if that is the case; unless it seeped out very slowly over many years. If there is a lot of air trapped in the system it can cause this. That would also be something which builds up slowly over the years due to porosity in the system on the low-side. It will cause the compressor to make a louder than normal sound when it runs, if this is the case, due to high pressure buildup. Also, if the compressor unloader is sticking it can cause this problem. If this is happening, the startup sound may not be quite normal but it is hard to describe exactly what it sounds like. The startup of the CK machine has a distinct change in the sound about 1/2 second after the motor starts. Normally it's slightly raspy sounding for about a half second, then changes to a quieter sound. If the unloader isn't working. it may continue to make the "initial starting" raspy type sound as it is running. The unloader requires oil circulation in the compressor to actuate it. If the machine is off-level or low on oil it may not circulate properly. You may try gently tipping the machine while it's running and see if the sound changes or it starts cooling. Sincerely, David
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Post by 1966novacoupe on Mar 6, 2022 14:57:18 GMT
is this the outlet of the float near the right rear of the machine? on start up yesterday the evaporator was not getting cold but this line was completely iced up solid. maybe indicating a blockage in the evaporator or float valve? hmmm, it seems i cannot rotate the image. and yes this is the m.t. ive posted about before. it has operated flawlessly for several years now. havent tried anything yet since ive never had one of these refrigeration units apart. sounds? a lot of gurgling when i turned it back on for 2 or 3 minutes. after that the unit is so quiet you can hardly hear it. the machine is perfectly level and hasnt been moved for all the years its been working in my house. [since my first post on this forum]. i let it sit all night not running. ill turn it on this morning and see what it does and report what i find. Attachments:
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Post by 1966novacoupe on Mar 7, 2022 3:57:34 GMT
so after 6 hours of running im not down to the temp i should be. you can see the small amount of frost on the evaporator and the line. [ sorry i still cant rotate the picture] so im thinking the charge of so2 has been slowly leaking out. ive been using it continually for several years now. does anyone know where i can buy or rent the charging tool that fits my machine and is r152a the best drop in refrigerant? i also have r 22 and r 134a. thanks for the advice
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Post by turbokinetic on Mar 7, 2022 13:32:06 GMT
so after 6 hours of running im not down to the temp i should be. you can see the small amount of frost on the evaporator and the line. [ sorry i still cant rotate the picture] so im thinking the charge of so2 has been slowly leaking out. ive been using it continually for several years now. does anyone know where i can buy or rent the charging tool that fits my machine and is r152a the best drop in refrigerant? i also have r 22 and r 134a. thanks for the advice That's a shame that it seems to have leaked out. SO2 is a lower pressure refrigerant than R22 or R134A. Those will overload the compressor. The original replacement for SO2 is R124 however that is being phased out. There are quite a few who have had good luck with R152A in these, so that is what I would recommend. The charging tool (hermetic service kit) is going to be a tough find. Most of us look on eBay for them but they are getting more scarce. I sent you a PM as well.
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Post by 1966novacoupe on Mar 8, 2022 9:47:43 GMT
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Post by turbokinetic on Mar 8, 2022 12:40:42 GMT
<button disabled="" class="c-attachment-insert--linked o-btn--sm">Attachment Deleted</button><button disabled="" class="c-attachment-insert--linked o-btn--sm">Attachment Deleted</button><button disabled="" class="c-attachment-insert--linked o-btn--sm">Attachment Deleted</button><button disabled="" class="c-attachment-insert--linked o-btn--sm">Attachment Deleted</button>update, the unit has been running now for about 15 hours. it seems to be running better than before the defrost [run times of less than 3 minutes and off times of about 25 minutes. the entire evaporator [where the cooling tubes run] has completely frosted over and getting thick. the temp on the side of the evaporator is 9 degrees and still dropping. cans of soft drinks are 24 degrees [im taking them out]. obviously it hasnt lost its charge. my thoughts are there was oil clogging the refrigerant tubes in the evaporator which have now cleared out. i had an issue a few years back with this unit not frosting up the evap. as it used to. one of the members in this forum suggested warming the evap. a bit. i did that with a 100w. light bulb. i didnt want to risk overheating the evap. it worked fine but still didnt frost the entire evap like its doing now. im guessing i needed to warm it a bit more than i did. this time i used one of the old electric freezer defrosters and watched it while it was on. i had to move the heater around the base of the evap to keep it heating evenly. after about 20 minutes the entire evap was warm to the touch [ any hotter and it would have been uncomfortable to touch ]. it seems as though i loosened up some thick oil that may have been causing a slight blockage for some time. i will continue to watch it and post the results but it seems my m.t. is going to continue to run for some time yet. b.t.w. just watched davids [ turbokinetic] video on rewiring a m.t. 5 star all the way. thanks for all the great advice, work and info that went into this. Hey that is great news! Happy to hear it started working! Sometimes these are finicky for unknown reasons and you just have to try again and then it works.
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Post by coldspaces on Mar 9, 2022 23:05:55 GMT
Good to see your refrigerating machine started cooperating. Sound like it was oil logged.
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Post by turbokinetic on Apr 4, 2022 1:25:38 GMT
Got an update on this little fridge. Unfortunately, the problems continued after the initial seeming success. It made the trip from California to Alabama for checkout and repairs. I am making videos to document its repairs, and will share them here! This is part 1:
https://youtu.be/k0Sq1BFcujE
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Post by ckfan on Apr 4, 2022 15:10:32 GMT
Excellent work as always David! So strange that the crack in the header suction connection didn’t leak nitrogen. I suspect that you are right and once it gets cold, the crack expands and lets air suck in. Makes me wonder how many of these old systems have a bad mixture of air, SO2, and moisture in the system. Yikes!
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Post by turbokinetic on Apr 4, 2022 20:10:36 GMT
Excellent work as always David! So strange that the crack in the header suction connection didn’t leak nitrogen. I suspect that you are right and once it gets cold, the crack expands and lets air suck in. Makes me wonder how many of these old systems have a bad mixture of air, SO2, and moisture in the system. Yikes! Thanks Ray! I think many of them which are showing intermittent issues like this probably have something like this happening. Sadly. I have another update! Got some results! https://youtu.be/jGjwoaHVvHA
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Post by 1966novacoupe on Apr 5, 2022 6:41:29 GMT
WOW, both videos are amazing. this unit has been running for 9 years now with no issues of any kind. the first indication of any issue was about 1 year ago. i noticed the entire evaporator was not icing up quite as much as it had been in the past but still cooling and cycling just fine. after defrosting [ noted in previous posts ] the cooling capacity diminished even more. then the unit started running non stop [without cycling on and off] with less than half of the evaporator icing up. at that point it seemed something had failed but i dont know enough about these units to properly diagnose it so i shut it down to avoid damaging anything further and contacted david. best call i ever made. now seeing how the float mechanism works, or doesnt work its easier to understand the dynamics. obviously the rewire was way overdue. none of this with the exception of the power cord was done when the cabinet was restored. it will be interesting to see the run times now as opposed to the last nine years. once i have the unit back ill post at intervals the performance of the unit but at this point i believe dave has breathed new life into our monty! dave your the best!
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Post by turbokinetic on Apr 7, 2022 0:08:55 GMT
WOW, both videos are amazing. this unit has been running for 9 years now with no issues of any kind. the first indication of any issue was about 1 year ago. i noticed the entire evaporator was not icing up quite as much as it had been in the past but still cooling and cycling just fine. after defrosting [ noted in previous posts ] the cooling capacity diminished even more. then the unit started running non stop [without cycling on and off] with less than half of the evaporator icing up. at that point it seemed something had failed but i dont know enough about these units to properly diagnose it so i shut it down to avoid damaging anything further and contacted david. best call i ever made. now seeing how the float mechanism works, or doesnt work its easier to understand the dynamics. obviously the rewire was way overdue. none of this with the exception of the power cord was done when the cabinet was restored. it will be interesting to see the run times now as opposed to the last nine years. once i have the unit back ill post at intervals the performance of the unit but at this point i believe dave has breathed new life into our monty! dave your the best! So happy you enjoyed seeing the videos! I appreciate your confidence in me and trust to send your valued fridge across country for repairs. I will be interested to hear how the cycle times are once it's back on its proper cabinet. I haven't timed it on my test cabinet due to running out of time before having to leave for work. Once I return home, will plug it back in and let it run for a week or two for a test-run.
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Post by 1966novacoupe on Apr 8, 2022 15:10:46 GMT
thanks david, im posting all the symptoms and findings [ as you can also] so other members might use that info to diagnose theirs when/if they have a similar problem. our ck has become a staple not only in our home but also in our circle of friends. everyone that stops by asks about it and most are amazed that it still works! they just dont make them like they used to! is the most common thing i hear. when ever your done let me know and ill arrange for the return trip home. thanks again.
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stan
5 Cubic Foot
Posts: 98
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Post by stan on Apr 22, 2022 6:48:23 GMT
I have the same problem with my CK 1-15 A16 So far I’ve been able to keep it going but often have to do the hot water trick, wait overnight, prey, ect then it will be o.K for a while. After watching David’s video..I suspect I may have something very similar going on with my ok’d girl. One day I fear I’ll not be able to unstick, and I’ll have to send off to David. (I’m Unsticking tonight) I probably need to start thinking of the logistics of how to get it to David from Ca.
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