Frosting question

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Frosting question

Postby RyanCaleb » Tue Oct 31, 2017 4:45 pm

Hello all,

Found a Toshiba DX unit short of refrigerant (R410a), electronic sniffer going off at flare.
Gauges showing 70psi suction and 290psi Discharge.

I was lead to believe that when a unit is short, the refrigerant bubbles off early causing to much superheat. so frosting early in the evap coil and expansion line, and a warm suction pipe and hot discharge pipe.

But this dx unit had a sweating expansion line and a frosting suction line through the suction line accumulator and all the way back to the compressor. Airflow was good over the evap coil.

Just wondered why this is happening??

I didn't find the right solution from the internet.
References: ... g-question

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