Customer Questions and Answers for Drier by Whirlpool

Hello Ryan. That is usually caused by tarnish on the copper lines from moisture. This is nothing to worry about as long as the system is not leaking or has any issues.

Hello Sharon. A filter-drier WPW10143759 in a refrigeration or air conditioning system has two essential functions: one, to adsorb system contaminants, such as water, which can create acids, and two, to provide physical filtration. Evaluation of each factor is necessary to ensure proper and economical drier design. Hope this helps.