Hisense portable AC only partially cooling


  #1  
Old 01-23-21, 04:19 PM
D
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Hisense portable AC only partially cooling

The unit is only 18 months old. It will only cool about 2F from 72F to 70F for a room about 120 sq ft. It it set to 62F. The outside temperature is 70F and the ac exhaust is not obstructed.

I cleaned the filters, they were not obstructed, and drained the water. After running the unit for 90 mins I took the back off and only one copper coil on the right and left side had frosted. One next to it was cold, the rest were at room temperature. The black tank I assume is the coolant storage tank. After running the unit it gets very hot. The lower coils are warm.

o appreciate your help on diagnosing potential problems and ideas on solutions. Thanks​​​​​​​




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Last edited by Dhorsup; 01-23-21 at 04:22 PM. Reason: Missing text
  #2  
Old 01-23-21, 04:43 PM
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Welcome to the forums.

That big black tank is the compressor.
Your problem..... your system is low on refrigerant. More than likely there is a slow leak.
 
  #3  
Old 01-23-21, 07:00 PM
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Thanks Pete. Do you know if it's possible to locate a leak and fix it? I don't want to add more coolant if it's just going to leak.
Thanks again for your help..
David
 
  #4  
Old 01-23-21, 07:23 PM
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Two ways to find a leak...... use a freon sniffer.
The other way is to evacuate the refrigerant, charge the system with nitrogen and check for bubbles.

Could be a bad weld. More likely a problem/leak in the evaporator/cold coil.
 
  #5  
Old 01-24-21, 08:30 AM
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Usually it’s not feasible to fix a leak on these units, without exceeding the cost on a new one.
 
 

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