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The Water Cooler
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Hvac refrigerant
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<blockquote data-quote="ShaneP" data-source="post: 3816452" data-attributes="member: 32676"><p>Can you tell if the compressor is running? Do you feel any heat coming off the top of the unit where the fan discharges? If you have an amp clamp, read amps on the compressor vs RLA on the unit name tag. If it's drawing low amps, it's low on refrigerant. Most all modern units will have a low pressure safety that will keep the unit from energizing if the charge gets to low. The compressor is cooled by the returning refrigerant vapor, so without the cool vapor coming back it will overheat and burn out. The low pressure will usually stop the entire unit, so the fan would not be running either. </p><p></p><p>Another thing you can do is feel the lines at the unit. The smaller line should be warm to the touch, and the larger line should be "beer can" cold if working properly.</p></blockquote><p></p>
[QUOTE="ShaneP, post: 3816452, member: 32676"] Can you tell if the compressor is running? Do you feel any heat coming off the top of the unit where the fan discharges? If you have an amp clamp, read amps on the compressor vs RLA on the unit name tag. If it's drawing low amps, it's low on refrigerant. Most all modern units will have a low pressure safety that will keep the unit from energizing if the charge gets to low. The compressor is cooled by the returning refrigerant vapor, so without the cool vapor coming back it will overheat and burn out. The low pressure will usually stop the entire unit, so the fan would not be running either. Another thing you can do is feel the lines at the unit. The smaller line should be warm to the touch, and the larger line should be "beer can" cold if working properly. [/QUOTE]
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