Start by checking for the 12 VDC between GL and B at the low voltage terminal strip in the ceiling assembly. THERMOSTATĦ799-730 SERIES CEILING PLENUM THERMOSTATħ330-730 & 8330-733 Series Cool Only Ducted Ceiling Plenums ħ330-735, 7330-736 & 8330-735 Series Heat/ Cool Ducted Ceiling Plenumsħ330-720 & 8330-723 Series Cool Only Remote Free Delivery Ceiling Plenumsħ330-725, 7330-726 & 8330-725 Series Heat/Cool Remote Free Delivery Ceiling Plenums Troubleshooting coleman Mach thermostat After Wiring No low fan operation The following table shows the thermostat control wiring, ceiling assembly wiring destinations, and relay functions for air conditioners with control boxes containing individual relays. Thermostat control wiring For Ceiling Plenums With Individual relays 6799-720 & -726 SERIES, 7330-720 & 726 SERIES CEILING PLENUMS See image below showing the location of the fuse. The fuse in a coleman mach thermostat is located right behind the thermostat. Where is coleman mach thermostat fuse located? Operation to help you understand what each wire does in the process of cooling or heating. The following chart shows the different electrical connections made by the thermostat during You may have more or less but these are the most common ones. The following table shows the common coleman thermostat wire colors and their functions. Yellow from thermostat goes onto red and red from thermostat goes on red or brown wire if you are a a brown wire.The white wire from the thermostat goes on the medium white wire from the wall.The green wire goes onto the green wire.The gray wire from the thermostat attach it to the smallest white wire from the wall.The blue wire from the thermostat bundle it up with the large white wire and a blue wire from the wall.That way you won’t have to study what wire colors go on what wire colors, you will just match up the wires based on the colors and you will be good to go.Īnother way to wire your Coleman Mach thermostat If you have wires like in the image below, connect the wires as follows. The easiest way to wire a Coleman mach thermostat is to cut the wires after the wire harness and simply connect the wires from your thermostat to those cut as you can see in the following image. But for the standard wiring diagrams, please see them near the bottom of this wiring guide. IMPORTANT: I want to be as simple as possible for everyone to understand. In this article, we’ll walk you through a step-by-step guide on how to properly wire your Coleman Mach thermostat, ensuring your RV HVAC system functions optimally and efficiently. The RV thermostat serves as the control center for your vehicle air conditioner, allowing you to set the desired temperature and regulate the cooling process. Do i need a ground wire, too?If you own a Coleman Mach air conditioning system and need to install or replace a thermostat, understanding the wiring process is important. If i can find a 12vdc source then I can run to the thermostat, but I have only 1 wire (red) left from the thermostat. I have no idea, as I don't have any 12vdc light in my trailer.Ĥ. Since you have to run a bunch of wires from the Control Box down to the thermostat, you can run one more wire for the 12V to the thermostat.ġ. You can now buy an 120VAC to 12DC adapter (Radio Shack) Plug the adapter into the Duplex box and then you have a new 12VDC source. Just splice it in series prior to the control box. Use the 120VAC coming to the new Control box. I have added a 120VAC Duplex box (THINK WALL OUTLET IN HOUSE) in the ceiling assembly area. Run a new 12V line from the fuse panel.Ĥ. Run 12V from the furnace to the thermostat. Just make sure you use 12V that comes to the light switch, not the 12V leaving the light switch to the light.Ģ. Run a 12V wire from a source near the new thermostat location. You have to run a 12VDC wire from somewhere.ġ. As a repairman, I run into this issue every time someone wants to change from ceiling controls to a wall thermostat.
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