No-Frost defrost heater service — electric heater under evaporator that runs automatically every 8-12 hours to melt ice. If burnt, ice builds on evaporator preventing air flow.
See if any of these signs match your device — each one increases the likelihood of this fault.
These are the causes we encounter while repairing Defrost heater burnt — ranked from most to least common.
Burnt heater wire (most common)
Cracked heater tube
Disconnected heater cable
Bad defrost thermostat (doesn't turn off heater)
Voltage spike burnt heater
Heater reached end of life (5-7 years)
Any of the following = a danger signal — call now and don't try to fix it yourself.
On-site diagnosis, clear pricing before any work, and a documented 6-month warranty.