As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF #1 FAIL FAIL INDICATION// RCP FAILURE. GROUNDED - YES. PERFORMED B737-800 FIM 23-11 TASK 801 HF BITE PROCEDURE. HF #1 RESET ITSELF. FAIL INDICATION RETURNED TO NORMAL. DUE TO ETOPS NATURE PLACED CALL TO KSFO AND OPS TEST GOOD PER B737-800 AMM 23-11-00-730-801.