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Author Topic: Uss-64 compressor will not turn off  (Read 9844 times)
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SquareTopCollector
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« on: February 05, 2012, 03:45:47 pm »

One of my cavilers compressors will not shut off. I swapped the T stat with another machine and it didn't solve the problem. What should I trouble shoot next? Can it be a relay? The compressor will turn off manually with the T stat dial.

Thanks
« Last Edit: February 05, 2012, 04:45:25 pm by SquareTopCollector » Logged
Yarochrehc
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« Reply #1 on: February 05, 2012, 07:14:02 pm »

Is the machine cooling OK?
 It sounds like you might have either a refrigerant problem or the evaporater fan is not working or something worse.
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Bob

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johnieG
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« Reply #2 on: February 05, 2012, 07:15:42 pm »

it may be time for a new thermostat. they're wired just like a temperature controlled "light-switch"  it's either on or off, so if it's stuck "on" try to give it a playful "rap" on the nose ( the knob-shaft) with the handle end on a screwdriver, sometimes the contacts just weld themselves together & stick closed (On) ... oops
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SquareTopCollector
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« Reply #3 on: February 05, 2012, 09:54:16 pm »

It gets really cold. The evap fan runs strong. The evap coils ice over. T stat is from a css-84 that works fine. I will knock it with a rubber mallet but I think it's something else. The line does have a tap on it.
« Last Edit: February 05, 2012, 10:10:36 pm by johnieG » Logged
johnieG
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« Reply #4 on: February 05, 2012, 10:05:58 pm »

don't use a mallet, use a screwdriver handle & a light "tap pity-tap" , or if you're determined to crush the poor thing, how's about a nice brick?  is the T-stat out of your CSS-84 the same type as the one you're trying to replace? and does the sensing end mount in the same spot? ( in the air vs mounted on the evap' coil housing ) or just replace the thermostat for Pete's sake. I'm out... glare
« Last Edit: February 05, 2012, 10:13:22 pm by johnieG » Logged

Spoon-feeding Newbies since 2001...Wink
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.
SquareTopCollector
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« Reply #5 on: February 05, 2012, 10:21:05 pm »

The CSS and USS are similar. T stats are mounted in the same place.   By the way I need a new fan for the CSS, where can I buy one?
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briandr1
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« Reply #6 on: February 05, 2012, 10:56:23 pm »

Johnstom supply or grainger will have replacement fan motors. If the comp is shutting off with the switch that tells you the problem is from the thermostat. I have one that the contacts stick sometimes and a tap wiyh a screw driver makes it open. Johnnie is right replace t stat. good luck
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selectivend 64 sa
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SquareTopCollector
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« Reply #7 on: February 05, 2012, 11:09:20 pm »

I don't need the motor just the blades. One cracked
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briandr1
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« Reply #8 on: February 05, 2012, 11:19:01 pm »

i have a set of blades from a cavalier round eveporator would prob work for you
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selectivend 64 sa
2 cavalier 96
1975 bally hi deal em pinball machine
1920 wate and fate penny  scale
MoonDawg
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« Reply #9 on: February 05, 2012, 11:22:00 pm »

       If you have already switched the thermostat with a similar "known working" unit and it acts the same, I'm not sure a brand new one will work any better. If they both manually switch off the compressor, the wiring must be ok too.
      I would suggest moving the capillary tube to different locations on the evaporator, as it seems there may be a cold sensing problem.
     
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Glen
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