As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - FLIGHT 2303 DE-ICE PRESSURE CAUTION LIGHT CAME ON AFTER AIRFRAME MODE SELECTED TO SLOW POSITION. AFTER CHECKLIST PROCEDURE, CAUTION LIGHT WENT OUT. LATER TURNED MODE SWITCH TO SLOW AGAIN AND DE-ICE PRESSURE CAUTION LIGHT ILLUMINATED. MAINTENANCE COMPLIED WITH MAINTENANCE PROCEDURE AND ALL OPS CHECK GOOD. DEFERRED IAW MEL 30-10-2(B).