[header] How to know if you should replace your dryer [title] Observe your dryer's efficiency. [step] The best way to tell if the appliance might be on its last legs is to simply see whether it's doing its job properly. Start paying close attention to how your appliance is working. 
If your clothes are coming out damp, for instance, it might mean that they just need a little more drying time, or it could indicate a problem with the dryer's heating elements. [substeps] Look for recurring issues that point to a specific flaw in the unit itself.