Mike M Charlotte , NC February 02, 2015 Appliance: Frigidaire Air Conditioner FAM18HS2A12 Frigidaire Air Conditioner Fam18hs2a12: Continued to run after turning off with power button i would have to disconnect power cord from power supply to turn off!. How to replace Relay. Replaced relay, P/N AP3969972 Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes