Kenmore Dryer Error Code E73

E73 indicates an open circuit in the Inlet Control Thermistor circuit. The control board is not receiving a valid resistance signal from the thermistor that monitors incoming air temperature. This points to either a defective thermistor or a wiring problem between the thermistor and the control board. The dryer may limit or stop operation until the fault is corrected.

Resetting the dryer by unplugging it for a few minutes may temporarily clear the E73 code, but the fault will return as soon as the control board checks the thermistor circuit again. Because E73 reflects an actual electrical fault (an open circuit), the underlying problem must be repaired before the code stays cleared.

If only the thermistor needs replacement, parts typically cost in the range of $15 to $40 depending on the specific model. If professional repair is needed, labor charges generally add $75 to $150 to that estimate. Wiring repairs can vary widely depending on the extent of the damage. Diagnosing the fault yourself with a multimeter before calling a technician can help keep costs lower.

Start by unplugging the dryer and locating the inlet control thermistor. Use a multimeter to measure its resistance: at room temperature (68 to 77 degrees Fahrenheit), the reading should fall between 47K Ohm and 66K Ohm. If the reading is out of range or shows open (OL), replace the thermistor. If the thermistor tests correctly, trace the wiring harness back to the control board and check for broken wires, loose connectors, or corroded terminals.

It is not recommended to operate the dryer while E73 is active. The inlet control thermistor helps the control board regulate heating, and running without a valid temperature signal could lead to improper heating behavior. Continuing to use the dryer before repairing the fault risks damaging other components or creating an overheating situation.