Introduction
Before you can fix anything inside of the Honeywell HY-204, you need to remove the case. Removing the case will require a bit of strength, but is pretty simple to do.
Tools
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Pull the front and back parts of the case away from each other until the back is free from the front. This may require a large amount of force.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.