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Ignorant Refrigerant Question [message #134464] Wed, 13 July 2011 11:53 Go to previous message
A Hamilto is currently offline  A Hamilto   United States
Messages: 4508
Registered: April 2011
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I have read in this forum that about 3 cans of Duracool is the "correct" amount of refrigerant in the OEM GMC dash A/C system, giving about 20psi on the low side at 1500 rpms. Less can result in pressures like 15psi at the low side and evaporator temperatures so low that water freezes in the coils and obstructs airflow.
So when you get condensation freezing in your evaporator at 15psi, why not REMOVE some Duracool to raise the temperature just enough to not freeze the condensate in the evaporator. Wouldn't you be running at lower pressure, and even less power required to turn the compressor?

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