The new Coleman-Mach WiFi Thermostat by Airxcel (9420-391 is the model number at the time of publishing this) is a promising option for enthusiasts, offering modern features like remote control via smartphone apps, scheduling, and eco mode while keeping things simple and functional. In this review, we share our hands-on experience with the Coleman-Mach WiFi thermostat and its key features, to help you determine if it’s the right fit for your setup.
