Somerset:

Daikin

Popular Models: FTXM20R, FTXM25R, FTXM35R, FTXM42R, FTXM50R, FTXM60R, FTXM71R, FTXM85R, FTXM95R, FTXM100R
Common Problems: Refrigerant leaks, dirty air filters, malfunctioning thermostats

Mitsubishi Electric

Popular Models: MSZ-LN25VG, MSZ-LN35VG, MSZ-LN50VG, MSZ-LN60VG, MSZ-AP25VG, MSZ-AP35VG, MSZ-AP42VG, MSZ-AP50VG, MSZ-AP60VG, MSZ-AP71VG
Common Problems: Clogged condensate drains, sensor problems, electrical control failures

Fujitsu

Popular Models: ASYG07KGTE, ASYG09KGTE, ASYG12KGTE, ASYG14KGTE, ASYG18LFCA, ASYG24LFCC, ASYG30LFCA, ASYG36LFCC, ASYG45LFCA, ASYG54LFCA
Common Problems: Frozen evaporator coils, fan issues, low refrigerant levels

Panasonic

Popular Models: CS-Z25XKEW, CS-Z35XKEW, CS-Z50XKEW, CS-Z71XKEW, CS-Z25VKEW, CS-Z35VKEW, CS-Z50VKEW, CS-Z71VKEW, CS-Z80VKEW, CS-Z100VKEW
Common Problems: Sensor malfunctions, drainage problems, compressor issues

LG

Popular Models: Standard Plus, Deluxe, Artcool Mirror, Artcool Gallery, Libero Plus, Prestige, Multi V S, Multi V M, Multi V Water, Multi V IV
Common Problems: Faulty thermostats, refrigerant leaks, dirty condenser coils

Samsung

Popular Models: Wind-Free™ Ultra, AR9500, AR7500, AR5500, AR4500, AR35, AR3000, AR24, AR18, AR12
Common Problems: Electrical control failures, sensor issues, drainage problems

Toshiba

Popular Models: Seiya, Shorai, Mirai, Daiseikai 9, Super Daiseikai 8, Suzumi Plus, Haori, Edge, N3KV Series, N3AV Series
Common Problems: Refrigerant leaks, compressor failures, thermostat issues

Hitachi

Popular Models: RAK-25PSE, RAK-35PSE, RAK-50PSE, RAK-25RPE, RAK-35RPE, RAK-50RPE, RAK-25RXE, RAK-35RXE, RAK-50RXE, RAK-70RXE
Common Problems: Dirty air filters, frozen coils, fan motor problems

Midea

Popular Models: MUE-09HRFN1, MUE-12HRFN1, MUE-18HRFN1, MUE-24HRFN1, Comfee MSR23-09HRDN1, Comfee MSR23-12HRDN1, Comfee MSR23-18HRDN1, Comfee MSR23-24HRDN1, Blanc Series, Mission Series
Common Problems: Improper use, clogged filters, refrigerant leaks

Trane

Popular Models: XR14, XR16, XR17, XL16i, XL18i, XV18, XV20i, TEM4, GAM5, TAM9
Common Problems: Sensor malfunctions, drainage issues, electrical control failures