As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX-MASTER CAUTION DEICE PRESS CAUTION LIGHT. LIGHTS FAIL TO ILLUMINATE ON OUTBOARD 2 SEGMENTS OF LEFT WING AND BOOTS VISUALLY DO NOT INFLATE. BULBS TEST OK. CREW DID NOT WANT TO ENTER ICING CONDITIONS AT GEG AND ELECTED TO DIVERT TO PDX. FLIGHT LANDED WITHOUT INCIDENT AT PDX. REMOVED AND REPLACED NR 1 DUAL DISTRIBUTOR VALVE. DEICE BOOTS INFLATE NORMAL DURING DEICE SYSTEM TESTS. AIRCRAFT RETURNED TO SERVICE.