![]() In that case they simply capped off the blue wire and made no connection at the t-stat, but I have no idea if there was any VDC(-) supplied to the A/C elsewhere, or even if it is needed. The analog t-stat had a blue wire connection. I saw one thread where someone actually installed the exact same thermostat from an analog t-stat that already had A/C control. I am wondering how important it is for the control panel on the A/C to connect to this at the t-stat? I could easily connect the new control panel straight to the VDC(-) at the same connection point at the heater and bypass the t-stat. However, at my heater, there is a straight connection to a 12VDC(-). Since I am using a household t-stat, I don't have a VDC(-) wire running to it. Although, probably at first I am simply going to wire the green and only have high fan. The new wiring says I need to connect the control board to the thermostat as follows :Ī/C -> green wire-> t-stat for, I believe, high A/C fanĪ/C -> gray wire to t-state, I think this is low A/C fanĪ/C -> yellow wire to t-stat, this should be A/C relayĪ/C -> blue wire to t-stat - this is labeled as 12 VDC(-), and then the diagram shows that there should be a 12VDC(-) connection to the t-stat.įor the most part, I am OK with the green, gray and yellow. This thermostat wire goes up the wall, past my A/C and over the the thermostat, so I am going to tap right into that wire. So, that is what is giving me my 12VDC (+) and my heater control. Currently, my t-stat only controls my heater, and my A/C controls are located on the ceiling unit.Ĭurrent wiring to the thermostat consists of a single red and single white wire coming off of my heater. My particular thermostat is a digital LUX household thermostat. I am in the process of installing one of the Airxel Circuit Boards that will allow me to connect my A/C to be thermostat controlled. Just curious if anyone here has had this specific situation. So, it’s well worth the effort to study the diagram and familiarize yourself with the workings of your RV’s electrical system.I did a search for this issue, and see some that are close but not quite the same. Knowing how the electrical system works allows you to save time, money, and frustration when it comes to servicing and troubleshooting any problems with your RV. Overall, understanding the Coleman Mach 3 wiring diagram can help you keep your RV running smoothly for years to come. Furthermore, you’ll have a better understanding of how the system works, so you can troubleshoot any issues that may arise. You can also learn how to properly install and maintain the system, ensuring optimal performance. By studying the wiring diagram, you can quickly identify what needs to be replaced or repaired. Finally, the control section includes all the relays, switches, and other components that allow you to operate the unit. The compressor section shows how the compressor, condenser, and fan are connected. This includes the power cord, the power switch, and the fuse box. The power section covers the connections from the RV’s power source to the air conditioner. It’s organized into three main sections: power, compressor, and control. The Coleman Mach 3 wiring diagram provides a detailed look at the electrical components of the air conditioner. That’s why it’s important to understand the basics of the wiring diagram. However, like any other electrical device, problems can arise that require repairs or maintenance. It’s designed to keep the interior of your RV cool and comfortable, even during the hottest days of summer. The Coleman Mach 3 air conditioner is one of the most popular models of air conditioners used in RVs. With a little knowledge of how the electrical system works, you can save yourself time, money, and frustration when troubleshooting issues with your RV. Coleman Mach 3 Wiring Diagram: A Guide to Understanding Your RV’s Electrical System If you own an RV, understanding the Coleman Mach 3 wiring diagram is key to keeping your recreational vehicle in top shape.
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