E5B Moderate Moderate DIY
Frigidaire Dryer E5B — Exhaust thermistor open / under temperature
Frigidaire Dryer · Error code E5B
What E5B Means
The control sees the exhaust (outlet) thermistor reading abnormally low resistance or open, suggesting the sensor or its wiring is faulty rather than an actual temperature fault.
Symptoms
- E5B flashes on display
- Dryer stops mid-cycle
- Clothes still wet at cycle end
- No heat or very low heat
Common Causes
1
Open or failed exhaust thermistor
Sensor on the blower housing reads out of range (should be roughly 50k ohms at room temperature).
2
Broken wire or loose connector to thermistor
Harness chafe near the blower housing or unseated 2-pin plug.
3
Failed main control board
Less common — board input circuit damaged.
How to Fix It
- Unplug the dryer before any testing.
- Remove the rear panel (electric) or front toe panel and tip the drum to access the blower housing.
- Locate the exhaust thermistor (small 2-wire sensor on blower outlet).
- Inspect the connector and wires for damage; reseat the plug.
- Measure thermistor resistance at room temperature — should read ~50k ohms (10k–50k depending on model). Open circuit = replace.
- If thermistor is good, check harness continuity from sensor to main control.
- If both are good, replace the main control board.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Frigidaire Dryer Codes
Verified against manufacturer documentation: frigidaire.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.