As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2097, LOST CABIN PRESSURE DURING CLIMB PASSING 15,5000 (ASG "CABIN PRESS") DURING OUR RETURN TO SEA, BELOW 5000FT CABIN STARTED TO PRESSURIZE NORMALLY. MAINTENANCE INSPECTED CABIN PRESSURE CONTROLLER, CONTROLLER STATIC LINE AND CAPTAINS AND FIRST OFFICERS MANIFOLD FOR CONTAMINATION. NONE FOUND. REPLACED CABIN PRESSURE CONTROLLER. PERFORMED PITOT/STATIC LEAK CHECK. CHECKS GOOD. FUNCTIONAL CHECK OF PRESSURE CONTROLLER CHECKS GOOD.