🧊 Excessive frost buildup in freezer

⚠️ Common Causes

Defrost heater failed, defrost timer failed, defrost thermostat open, door seal leaking

🔧 Parts to Check

• Defrost heater
• Defrost timer/control
• Defrost thermostat
• Door gasket

🔧 Troubleshooting Steps

1. Manual defrost: unplug fridge for 24 hours to melt all ice
2. Test defrost heater: check continuity — should read 20-60Ω
3. Test defrost thermostat: should be closed (continuous) at cold temps
4. Test defrost timer: should advance to defrost cycle every 6-12 hours

💡 Related Resources

• Look up error codes for your appliance
• Component failure reference — ohm ranges and test procedures
• All troubleshooting guides — browse by appliance type
• Find service manuals for your specific model