Review on Motorcraft RT1227 Thermostat Assembly by Ryan Brunson

2011-2014 Ford F-150 (and possibly others) WILL NOT FIT aftermarket thermostats. Do not install a non-original thermostat on your truck or allow anyone to install it. This is the Original Equipment Manufacturer (OEM) thermostat you need. The aftermarket thermostat can cause the fan to activate excessively/continuously which is very noisy and very annoying. If you are having this fan activation issue, it is also due to a faulty AC expansion valve. If you haven't fiddled with your thermostat lately, chances are this is the problem. Much luck