What was found
AT 13,000¿ ON APPROACH TO HIGH ALTITUDE A/P (KTEX), HEARD LOUD POP, FOLLOWED BY RUSHING AIR AND CAB ALT RED ANNUNCIATOR (HOWEVER CABIN ALTITUDE SHOWED 9000 FEET). COMPLIED WITH QRC/QRH. ON MISSED APPROACH, ALSO RECEIVED EMER PRESS (AMBER), DUCT OVHT CAB (AMBER), WING ANTICE R (AMBER) ANNUNCIATORS. CABIN PROCEEDED TO GET WARM AND COMPLIED WITH THE APPROPRIATE QRHS AS NEEDED. DIVERTED AND LANDED ELSEWHERE WITHOUT FURTHER INCIDENT CORRECTIVE ACTION: REPLACED CABIN ALTITUDE PRESSURE SWITCH. OPS CHECK GOOD. IAW CESSNA 560XL MM 21-31-05