An AED can pass its daily self-test and still be unprepared if the electrode pad package has expired, been opened, or gone missing. That is why the question of how often replace AED pads deserves a specific answer instead of a guess. In most cases, replace them by the expiration date printed on the sealed package – and immediately after they are used or damaged.
AED readiness is a small maintenance task with a large consequence. Whether the device is kept in a school hallway, fitness center, church, office, medical practice, or home, the pads are what connect the AED’s analysis and shock capability to the person in cardiac arrest.
How Often to Replace AED Pads
Most AED electrode pads have a shelf life of two to five years from the date of manufacture. The correct replacement date is the one printed on the specific pad package or listed by the AED manufacturer. Do not rely only on the date an AED was installed, the age of the cabinet, or the date the unit was purchased.
Pad life varies because each manufacturer uses different materials, packaging, and conductive gel formulations. Heat, humidity, poor storage conditions, and a damaged seal can shorten the useful life of a set of pads. A device stored in a climate-controlled office may have a different maintenance history than one kept in a gym, warehouse, vehicle, or outdoor-accessible cabinet.
The practical rule is simple: check the expiration date during every scheduled AED inspection, arrange replacement pads before that date arrives, and install the new set promptly. Keep the unopened replacement set with or immediately beside the AED when possible, so a gap does not develop between removing expired pads and receiving new ones.
Replace Pads Immediately After Use
If an AED is used in an emergency, replace the pads afterward – even if the AED never delivered a shock. Once pads have been removed from their sealed pouch or placed on a person’s chest, they are no longer suitable for routine readiness.
The conductive gel may have dried, the adhesive may not perform as intended, and the pads may have been exposed to sweat, chest hair, moisture, medication patches, or movement during care. The device may also have recorded event data that needs to be reviewed according to your organization’s response plan. Return the AED to service only after installing a new, compatible set of pads and confirming that the device shows a ready status.
It is also wise to replace pads after a training demonstration if the actual response pads were opened. Training pads are designed for practice and should not be substituted for live-use pads. A real AED should remain equipped with sealed, in-date pads that are intended for that exact model.
Other Reasons AED Pads Need Replacement
Expiration is not the only reason to replace AED pads. Change them immediately if the packaging is torn, punctured, wet, unsealed, or visibly degraded. A package that has been left in excessive heat or cold may also need replacement, even if the date has not passed. Follow the manufacturer’s storage guidance for the specific device.
Replace pads if they have been removed from the AED and cannot be confidently identified as the correct set. Pads are not universally interchangeable. Connectors, programming, energy settings, and instructions vary by manufacturer and model. Using a pad set that looks similar is not an acceptable substitute for using the one approved for your AED.
Some AEDs use pre-connected pads that remain plugged into the device inside the carrying case. Others use pads stored in a separate compartment or cabinet. Either setup can work well, but the inspection process needs to confirm that the pads are present, properly connected when required, and ready for immediate use.
Adult and Pediatric Pads: Check Both
Many organizations need to maintain both adult and pediatric AED capability. Adult pads are generally used for victims age 8 and older or weighing at least 55 pounds. For younger children and infants, use pediatric pads or a pediatric energy-reduction system if one is available and compatible with the AED.
Pediatric pads often have their own expiration date and should be checked separately. A common oversight is replacing the adult pads while forgetting the pediatric set stored in the same cabinet. If your school, child care program, youth sports organization, or community site has children present, include pediatric pads in the same inspection routine.
In an emergency, do not delay AED use while searching for pediatric pads if only adult pads are available. Follow the AED’s voice prompts and current emergency response training. The priority is early CPR, early defibrillation when advised, and activation of 911.
Build AED Pad Checks Into a Monthly Routine
A monthly visual inspection is a reliable habit for workplaces, schools, faith communities, and other sites with an AED. Assign a primary person to complete it and a backup person who understands the process. Record the inspection date, pad expiration date, battery status, and any action needed.
During the check, confirm that the AED’s status indicator shows it is ready. Verify that the pads are present, sealed, and within date; the battery is within date; the case or cabinet is accessible; and the rescue kit contains basic supplies such as gloves, a razor, and a towel if your organization uses one. Also make sure no one has placed furniture, boxes, decorations, or a locked door between the AED and the people who may need it.
Monthly checks are not a replacement for following the manufacturer’s maintenance instructions. Some devices perform automatic self-tests, but a self-test cannot always tell you whether staff moved the AED, whether the pad package is missing, or whether an expiration date is approaching. Human eyes still matter.
Keep the Battery Schedule Separate
AED pads and AED batteries do not necessarily expire at the same time. A battery may last several years, but its replacement date can be earlier or later than the pad expiration date. Track each item separately.
This distinction prevents a familiar problem: a team replaces pads and assumes the AED is fully maintained, only to later find that the battery has reached its replacement date. When ordering supplies or updating inspection logs, document the device model, pad type, battery type, lot information if applicable, and each printed expiration date.
After any AED use, inspect the battery as well. Depending on the model and the length of the event, the device may require a new battery before it can be returned to service. Follow the device instructions rather than assuming the battery is fine because no shock was delivered.
Make Replacement Easy Before It Becomes Urgent
The best AED maintenance plan is the one people can follow on a busy week. Put pad and battery expiration dates on a shared calendar with reminders several months in advance. Keep the AED model and supply information in the inspection log. If your organization operates multiple locations, give each unit its own record rather than relying on one general reminder.
For schools, employers, and community organizations, AED readiness should also be part of the larger emergency response plan. Staff should know where the device is located, who calls 911, who begins CPR, who retrieves the AED, and who checks it after an incident. Hands-on CPR and AED training helps turn that plan into a response people can carry out under pressure.
Richmond Training Concepts teaches practical CPR and AED skills through recognized training programs, helping participants become more comfortable with both the device and the moments that matter before it arrives.
An AED is not something to set on a wall and forget. Check the pads, replace them before their printed expiration date, and keep the device ready for the person who may need it without warning.