What was found
DURING TAKEOFF ROLL, INBD COOL FAIL STATUS MESSAGE. AFTER WHEELS UP, OVERBOAD COOL CAUTION MESSAGE. QRH AND RETURNED TO DEPARTURE, AFTER LANDING COOL EXHAUST FAIL STATUS. THE STATUS AND CAUTION MESSAGES ALL CLEARED DURING ROLLOUT. TROUBLESHOT ALL 3 MESSAGES; INBD COOL FAIL, OVBD COOL CAUTION, COOL EXHAUST FAIL IAW FIM AND FOUND PASSENGER DOOR OUTER HANDLE SWITCH S102MB TO BE AT FAULT. R & R PAX DOOR OUTER HANDLE SWITCH, S102MB IAW AMM, OPS CHECKED GOOD.