James K Yorktown , VA January 15, 2017 Appliance: Model LG LRE30755ST / 03 Lg model lre30755st / 03: f 3 error code when baking ORDERED AND RECEIVED REPLACEMENT THERMISTOR; REMOVED BACK COVER TO OVEN/RANGE; REPLACED THERMISTOR; REPLACED BACK COVER. WILL OPS CHECK WHEN WIFE NEXT BAKES. SO FAR, SO GOOD. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes