What F dS / r dS (795 / LG-built) Means
F dS and r dS on 795-prefix LG-built Kenmore refrigerators report the freezer and refrigerator defrost sensors as shorted or wired wrongly. The part named is a controller assembly that carries both the defrost thermistor and the defrost system fuse in one piece.
Common Causes of F dS / r dS (795 / LG-built)
- A defrost thermistor shorted within the controller assembly
- A blown defrost fuse within that same assembly
- Wiring damage in the defrost sensing circuit
🔧 One Safe Check You Can Try
Look at whether frost is building on the back wall of the affected compartment and how quickly it returns after a manual defrost; that timing is a genuinely useful detail.
⚠ Why You Shouldn't Go Further Than That
- Unplug the appliance and let ice melt before the evaporator cover is removed; the defrost heater behind it runs at line voltage.
- Because the thermistor and the fuse share one assembly, this is not a small sensor swap on this platform.
- Chipping ice off an evaporator to reach the assembly bends fins and pierces tubing with very little force.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.