The (or activation code) for a Robinair filter drier is a unique 10-digit code located on a sticker attached directly to the body of the new filter . This code is required by newer Robinair machines (like the 34788NI) to reset the internal refrigerant counter after a mandatory filter change (usually every 150 lbs of refrigerant filtered). How to Use the Serial Number
⚠️ Using the wrong filter can damage the compressor or contaminate refrigerant. robinair filter serial number
: Each serial number is unique. If the machine displays "Invalid serial number," it likely means the number was mistyped or that specific filter has already been registered in that machine. How to Enter the Serial Number During Maintenance serial number The (or activation code) for a
: If you receive a "SERIAL NUMBER ERROR," the code may be invalid or already used in that unit. In rare cases, you may need an override code from Robinair Tech Support at 1-800-822-5561. Maintenance Requirements Filter Life Decoding the Robinair Filter Serial Number Step 4:
If the filter is not replaced and the code is not entered, the machine will display a warning—such as "filter capacity low, recover will lock out after 25 lbs"—and eventually stop functioning to protect its internal compressor from contaminants.
