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Capillary tube replacement

My wife had a service technician come in to her store to repair a true TSSU-60-16 salad unit.He found a leak, repaired it & recharged it with 134A refrigerant.He also informed her the capillary tube was plugged & needs to be replaced.1. According to the website this unit is supposed to use 404A refrigerant, will the 134A harm it? 2. He said it will be $500.00 to replace the capillary tube, is this reasonable? 3. Will the compressor fail sooner due to the plugged capillary tube? It seams to be working O.K. since his repair.
Thanks,

pressman

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The True TSSU-60-16 uses an oversized (134A) refrigeration system with air flow directed at the pans.... if the capillary tube is plugged it will NOT cool at all.. most of the time a restriction (plug) is at the drier where the capillary tube goes into it.. as it is smallest passage in the system...hope it helps

Posted on Sep 02, 2008

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A restricted cap tube will greatly reduce the life of the compressor.
I would guestimate that the job of replacing the cap tube will take about 3 to 4 hours, plus a new dryer / filter and refrigerant. ( about an hour just to evacuate the system). I am pretty sure your unit uses R134A. It should say on the compressor as well as the inside sticker. Cap tube restrictions are a problem with the R134 systems. Hardly ever had them with the old R12.

Posted on Feb 02, 2013

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The type and amount of refrigerant will be listed on the model number tag on the left side interior wall of the unit. A partial blockage of the cap tube must be cleared for the unit to cool properly and to allow enough cool refrigerant to return to the compressor to keep it cool. I have heard from a fellow technician recently who tells me that he has had great success cleaning rather than replacing cap tubes by adding Supco S8 oil additive to running units. I have not yet had the opportunity to try it but if it saves the trouble of removing and replacing the cap tube I am going to give it a shot.

Posted on Feb 03, 2010

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