LG · Oven Moderate

F17 — Lower convection fan error

The lower-oven convection fan is not turning when commanded, or its feedback is missing for more than ~1 minute during a convection cycle.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
lgparts.com ↗

How to fix it

  1. Power down at the breaker.
  2. Remove the lower-cavity rear convection cover and spin the blade by hand — must spin free.
  3. Tighten blade hub or replace bent blade.
  4. Disconnect the motor at its plug and measure winding resistance against service-manual spec.
  5. Replace lower convection fan motor if open or seized.
  6. If the motor checks good, verify line voltage to the motor plug while the control commands convection; if absent, replace the main control board.

Why it happens

Typical signs: F17 or F-17 on display · Lower convection cycle quits · No fan noise from lower cavity · Upper oven and standard bake still work

  • Lower convection fan motor seized Bearings failed from heat fatigue.
  • Fan blade loose and binding on shroud Hub backed off; blade tilts and scrapes.
  • Open winding in motor Motor reads infinite — coil opened.
  • Wiring or relay fault on main control board Relay never closes or harness opened.

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.

  • LG lower convection fan motor Common replacement
    Amazon →

More LG oven codes

5b 5b — Sabbath Mode active (not a fault) CF1 CF1 — Left-front cooktop sensor open/short CF2 CF2 — Left-rear cooktop sensor open/short CF3 CF3 — Right-front cooktop sensor open/short CF4 CF4 — Right-rear cooktop sensor open/short F1 Range F1 — Upper Oven Thermistor Error

All LG codes → All oven codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lgparts.com.