Findings: Filter drier cold, dew or frosting possible

Cause: Partial blocking of dirt strainer in filter drier.

Action: Check whether there are impurities in the system, clean out where necessary. Replace filter drier. Please remember to seal the old filter after removal.

Cause: Filter drier completely or partly saturated with water or acid.

Action: Check whether there is moisture or acid in the system, clean out where necessary and replace filter drier (with DC-type filter) several times if necessary. If acid contamination is severe, replace refrigerant and oil charge, install DCR filter drier with interchangeable core in suction line.

Findings: Filter outlet side colder than inlet side (can be iced up)

Cause: Filter clogged.

Action: Replace Filter drier

Cause: Filter under-sized.

Action: Compare filter size with system capacity. Replace filter drier.