My Frigidaire, refrigerator model # FFTR1814LWD and freezer are not cooling NOR not blowing air in the fridge at all, the light works, the compressor runs and evaporator fan inside the freezer is working. When I opened, the back panel, ice was ONLY built up around where the thermostat and heater connect, of course that bit of ice is no longer the issue. I ordered a defrost timer and changed it. I am currently leaning toward a replacing the thermostat, the compressor relay and capacitor as, I really do not want to call a technician unless it’s absolutely necessary, meaning something I can’t figure out on my own. Please let me know if think that will get my unit back up and running or if you think it I should replace something else? Want to order everything I need this time so as not to keep paying for shipping with multiple parts orders.