Repair information - PENN Controls - A421ABD - A421AED - Electronic Temperature Control - A421 Off‐Cycle Defrost Model

A421 Series Electronic Temperature Controls with Off-Cycle Defrost Installation Guide

Product name
A421 Off‐Cycle Defrost Model
Document type
Installation Guide
Document revision
Revision date

Do not attempt to repair or recalibrate the A421 Temperature Control. In case of a defective or improperly functioning control, contact your nearest authorized Johnson Controls/Penn distributor or sales representative.

When you contact your Johnson Controls/Penn distributor, have the model number of the control available. You can find this number on the label inside the cover of the control.