paulheels
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« Reply #10 on: August 06, 2009, 05:47:30 pm » |
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Thanks for all the help everyone. I ordered the fans and installed three of the fours, got to make a bracket for the fourth one. Turned on the machine and they run great. After three days i noticed that the compressor was not shutting off. Hte temp varies between 36 and 38 degrees, there is frost buildup on the evaporator . No ice and not 100 percent coverage of frost. Before installing the evaporator fans, the compressor would shut off. the temp would not get below 48 degrees.
What is the deal here. I have read many post and my conlcusion is the Thermostat, with the possibility of the freon being low. anyone got any other ideas ot ways to begin trouble shooting?
Thanks
Paul
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paulheels
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« Reply #11 on: August 10, 2009, 05:48:06 am » |
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anyone got anything for me?
thanks
Paul
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johnieG
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« Reply #12 on: August 10, 2009, 10:48:03 am » |
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Assuming it's an air-sensing type thermostat, then either you've disturbed the position of the thermostats sensing tip ( it's not directly in the cold air stream) or you have it set too cold, or it's a bad thermostat.
If it's a direct contact type, then make sure it's clamped snuggly ( but don't go gorilla & crush the tubing) to the evaporator preferably nearest the capillary tube side of the evaporator. or it may be the type that slides into a small tube that runs through the evaporator core.
if you've disturbed the capillary tubing or sensing tip of the thermostat, make sure you didn't kink it, at which point you'll be looking for a new one.
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Spoon-feeding Newbies since 2001...  Yeah..220,221 whatever it takes. Remember, all it needs is a shot of Freon! The Vendo V-83 is the '59 Edsel of the coke machine world. ;p Spray painting does NOT restore a compressor 11 is louder than 10... "Hope" is good, but it's not an action plan. |
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paulheels
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« Reply #13 on: August 21, 2009, 05:55:40 am » |
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New update on the cooling problem. Not solved yet, but gaining ground, thanks to all qho have helped. just need a little more guidance. Here are the new things. The thermostat probe is a contact probe. it slides into a copper tube on the side of the evaporator. the end of the probe has a spring, it is heavily coated with old grease, should that be clean or is that some type of contat adhesive? I made sure to push the wire as far as i could without crimping.
I turned the thermostat on and let it cool. it cooled down to about 34-36 degrees but never !%@$ off. i had it set on the lowest setting, and it run for aobut 12 hours. It never shut off. also, once it started cooling there was immediate frost buildup on the evaporator. I live in South Carolina, in Aiken, and it is very humid, thought that might be part of the problem. Maybe it needs charging?
I am beginning to think that the therm is bad. let me know what yall think.
I appreciate all the help, yall are a great resource. Paul
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johnieG
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« Reply #14 on: August 21, 2009, 07:08:43 am » |
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replace the thermostat.
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Spoon-feeding Newbies since 2001... Yeah..220,221 whatever it takes. Remember, all it needs is a shot of Freon! The Vendo V-83 is the '59 Edsel of the coke machine world. ;p Spray painting does NOT restore a compressor 11 is louder than 10... "Hope" is good, but it's not an action plan. |
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paulheels
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« Reply #15 on: August 22, 2009, 06:05:01 am » |
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thanks Johnnie G. straight to the point! have done alot of looking online for another therm, nothing seems to be coming up that resembles mine. The part is a Cutler-Hammerpart num 9531n181
Paul
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« Last Edit: August 22, 2009, 06:49:32 am by paulheels »
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Brownac1983
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« Reply #16 on: August 28, 2009, 02:54:03 pm » |
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I have a CVC-224, which seems very similar to what you described. I'm also working out some refrigeration issues, with a swap over to R-134. My machine would not cool when I got it and I narrowed it down to a sealed system problem. I tapped in and found that there was no static pressure, so basically my sealed system was not sealed anymore. I evacuated and recharged with Hotshot. I could only get the temp down to 40 degrees, with the compressor running constantly. I took pressure readings and my compressor was only making around 100PSI. I couldn't find any specific specs, but figured that the pressure was not high enough for good cooling by comparing it to specs of similar systems. I got a R-134a compressor from a refrigerator and brazed it in. I flushed all the tubing to remove any old oil. I put in a new drier and charged with R-134a. I fired it up and found out where my R-12 had gone. The condenser outlet where the tube makes a 90 degree bend and goes into the drier was leaking through a hairline crack in the tube. The increase in pressure with the new compressor was enough to really open it up. The tube appeared to be steel. I brazed it up and recharged and it was cooling great. Unfortunately, I didn't have time to get the charge right because I had to go out of town the next day. Sorry to be lengthy, but check the area I mentioned for any evidence of leakage and maybe sand off the paint and check for cracks. My thoughts are that your evaporator was getting cold enough to trip the thermostat before you fixed the fans. Now that they are running, they are transferring heat from the cabinet to the evaporator like they are supposed to, and now your evaporator won't get cold enough to trip the thermostat because for whatever reason your sealed system can't get it there.
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