What F dH / r dH (795 / LG-built) Means
F dH and r dH on 795-prefix LG-built Kenmore refrigerators mean the defrost sensor never saw the temperature rise above 40 degrees Fahrenheit during a defrost cycle. In other words the heater was commanded on and the coil never warmed as it should.
Common Causes of F dH / r dH (795 / LG-built)
- A failed defrost heater element
- A blown fuse in the defrost controller assembly
- A defrost relay on the control board no longer closing
🔧 One Safe Check You Can Try
Move perishables to a cooler spot if the compartment is already warming, and note how long the appliance has been struggling; a coil that has been icing for weeks behaves differently from one that failed yesterday.
⚠ Why You Shouldn't Go Further Than That
- Unplug the refrigerator and allow ice to melt naturally before the evaporator cover comes away.
- A heater tested with the appliance plugged in is a genuine shock risk in a compartment full of melt water.
- A heater replaced while the defrost fuse is open will still never warm the coil.
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.