All About Dometic RV Thermostat; Dometic RV Thermostat Wiring Diagram

Keeping your RV running smoothly and comfortably is a top priority, especially during the cold months. One common issue that can arise is an improperly working RV thermostat. This blog post will discuss all you need to know about Dometic RV thermostats, including their wiring diagrams. We hope this article will help you keep your RV running in tip-top condition. All about Dometic RV thermostat; Dometic RV thermostat wiring diagram is the main topic of discussion in this blog post. Continue reading to learn!


What Is a Dometic RV Thermostat?

RV thermostats are devices that control the temperature inside your vehicle while you’re away. It can be helpful if your RV is too cold or hot, but it could also be dangerous and result in costly repairs. There are a few things you need to know before buying one.

First, what type of thermostat do you need? A manual or automatic? Manuals work like regular thermostats in your house – you set the temperature, and it stays that way until you change it. A mechanical model will adjust the temperature based on the current weather conditions. Which one you choose is up to you – either will work fine.

Next, what size thermostat does your RV require? Most RVs come with either 1/2 or 3/4 horsepower thermostats, so be sure to pick the right one if you’re not sure. The next question is, where should the thermostat be located in the RV? Most people put them near the air conditioner unit, but there’s no wrong answer here. Just make sure you can reach it without getting out of bed!

Now that we’ve covered what a Dometic RV thermostat is and what type of device it is let’s take a look at how to wire it up! All Dometic models use either three-pin or four-pin wiring, so make sure to get the correct connector for your rig – often, there’s a label on the connector or inside the RV itself. Once you have the right connector, plug it into the wall, and your RV’s thermostat is ready!

What is a Dometic RV thermostat?

How Does a Dometic RV Thermostat Work?

The Dometic RV thermostat is a device that controls the heat and air conditioning in an RV. The thermostat is installed in the engine compartment and connects to the wiring system through the factory harness.

When you turn on the ignition, the thermostat starts to warm up the engine block. As long as you keep the engine running, the thermostat will maintain a set temperature by controlling how much energy is supplied to the furnace. The engine cools down quickly when you stop driving, and so does the thermostat. The next time you start your RV, it will begin to be cold because there is not enough energy stored in the battery to reach operating temperature.

Dometic includes a built-in timer that resets itself after approximately 20 minutes of inactivity to prevent this from happening. If your RV has been parked for longer than 20 minutes, it is best to reconnect your battery before starting your RV.

Wiring Diagram for a Dometic RV Thermostat

Wiring diagrams can be complex, so if you are not familiar with them, consult an experienced electrician. The diagram shows the basic configuration of a Dometic RV thermostat. The black and red wires are the +12V and -12V power lines, respectively. The white wire is the neutral wire. The blue wire is the ground wire. The red and black wires go to the thermostat, while the white wire goes to a fuse box or another source of 12VDC power.

How Do You Wire a Dometic Digital Thermostat?

The Dometic RV thermostat is a simple yet effective way to regulate your RV’s cooling and heating system. When connecting the wiring to the thermostat, be sure to follow the specific wiring diagram that is provided with the product. This guide will walk you through each step of hooking up your new thermostat.

To begin, unpack the thermostat and disconnect any existing wires that may be connected. Next, locate the black and white wires connecting your furnace or air conditioner terminals. Strip 1/2 inch of insulation off each end of both wires and Twist them together. The black wire should go into terminal 1, and the white wire should go into terminal 2. Finally, twist each wire around a screw on the back of your furnace or AC unit. Reconnect any necessary cables and plug in your Dometic RV thermostat.

Once plugged in, turn your furnace or AC on (if applicable) and wait until it reaches operating temperature before adjusting the temperature setting on your Dometic RV thermostat. Be sure to keep an eye on the settings, so you don’t overheat or cool your RV too quickly; this could cause problems with the system. If everything goes according to plan, you’re ready to enjoy comfortable summer temperatures!

If you have any questions about wiring your Dometic RV thermostat, be sure to ask the experts at a local RV dealership. They will be more than happy to help you get started.

How Do You Wire an Analogue Thermostat to a Digital RV?

Analogue thermostats are a popular option for retrofitting older RVs with newer heating and cooling systems. They can be wired directly to existing digital RV thermostats or connected via a compatible controller. Wiring an analogue thermostat to a digital RV thermostat is straightforward, but there are a few essential details to remember.

First, ensure that the analog and digital units use the same voltage (12 or 24 volts). Second, match the analog unit’s red and black wires to the digital unit’s corresponding red and black wires. Finally, connect the white wire from the analogue unit to the yellow wire on the digital unit.
Once the wiring is complete, test the connection by turning on the power to the RV and verifying that the thermostat is working correctly.

How Do I Install a Dometic Thermostat?

Installing a Dometic RV thermostat is a simple process that can save you energy and money on your RV camping trips. The thermostat comes with detailed wiring diagrams to help you install it correctly.

To install the thermostat, connect the black wire to the black terminal on the battery box and the red wire to the red terminal. Connect the white wire to the white terminal on the battery box, and connect the green wire to either the ground or another white wire in your RV circuit. Finally, connect the blue wire to one of the blue terminals on your RV thermostat.

How do I install a Dometic thermostat?

Dometic RV 3 Wire Thermostat

The Dometic RV 3-wire thermostat is a popular choice for use in recreational vehicles. The thermostat features three wire terminals that make it easy to connect to your RV’s electrical system. The thermostat also includes an auto-away timer that will automatically turn off the unit after a set amount of time has passed, preventing it from constantly running if you are not home.

The Dometic RV 3 wire thermostat is an excellent option if you want a simple and easy-to-use thermostat that will provide reliable performance.

CONS: Some users have found that the auto-away timer does not work correctly and can be unreliable.

How Do You Hook up a Dometic Thermostat?

WD Howe says a Dometic RV thermostat “works with all makes and models of RVs.”

There are three primary connections on a Dometic RV thermostat: the power connection, the ground connection, and the sensor connection. The power and ground connections should be made to an electrical outlet that is properly fused and grounded. The sensor connection goes to the temperature probe in the furnace or air conditioner.

To set the thermostat, first, make sure that the power and ground connections are made. Then open the cover on the thermostat and find the sensor connection. Unscrew the probe from the connector and screw it onto the connector on the thermostat. Finally, screw the cover back on and test it by turning on the power to the thermostat and checking that the temperature shows up on display.

Can I Replace My RV Thermostat With Any Thermostat?

Replacing your RV thermostat is a common task many owners of RVs perform. There are a variety of thermostats available to choose from, so it cannot be easy to decide which one is the best for your RV.

One option is to use a regular thermostat in your home. This will work in most cases, but you may need to adjust the settings depending on your RV type. Another option is to buy an RV-specific thermostat. These thermostats are designed specifically for RVs and often have more features than regular thermostats. They can also be more expensive, so choosing one that meets your needs is essential.

If you decide to replace your RV thermostat, there are a few things you need to know before you start. First, check the wiring diagram for your RV. Many RVs use similar wiring, so replacing the thermostat will usually require connecting the new device to the existing wiring. Second, make sure you have the correct replacement part. There are several types of RV thermostats, each requiring a separate replacement part. Finally, install the new device correctly – ensuring its level and adequately secured can help keep it working optimally.

What Do D1 and D2 Mean on the Dometic Thermostat?

The d1 and d2 terminals on the Dometic RV thermostat are for the power supply. The wire connecting these terminals should be connected to a 12-volt power supply (such as a battery) in the RV. The other end of this wire should be connected to the red/white wire from the outside unit’s circuit breaker.

How Do I Know if My Dometic Thermostat Is Terrible?

If your Dometic RV thermostat isn’t working or is just not cooling the RV as it should, there are a few things you can do to determine if it is terrible and needs to be replaced. First, check the power cable connection by gently tugging it and checking for any frayed or damaged insulation. Check for apparent physical damage to the thermostat if the connection is okay. In that case, if there are scratches or dents on the housing, this may indicate that the thermostat has been impacted by physical debris. If these checks prove harmful, your thermostat must most likely be replaced.

What Is the Blue Wire on an RV Thermostat?

The blue wire on an RV thermostat is usually the ground wire. It is used to connect the thermostat to the RV’s chassis.

Is There a Difference Between an RV Thermostat and a Regular Thermostat?

A regular thermostat is plugged into an outlet, and an RV thermostat is plugged into the heating system.
RV thermostats are designed to work with RVs because they have different wiring. An RV thermostat has a voltage regulator and a relay in addition to the standard electrical connectors. This makes it other than a regular thermostat.

When you turn on your RV, the voltage regulator kicks in and increases the voltage going to the relay. The relay turns on the fan and sends power to the heater element. When you turn off your RV, the voltage regulator decreases the voltage going to the relay, turning off the fan and heater elements.

Can You Replace the Dometic Thermostat?

If your Dometic RV thermostat is not functioning, it may be time to replace it. This guide will walk you through the process of replacing a Dometic RV thermostat.

Before beginning, you must consider a new thermostat, an 8-foot wire harness with connectors (or an approved equivalent), and a power supply capable of supplying 12VDC to the thermostat. If your Dometic RV uses water heating instead of AC, you will also need access to the water pump and electrical box.

Once you have all of the necessary materials, follow these steps:

  1. Simply disconnect the negative cable of the battery from your vehicle.
  2. Connect one end of the wire harness to your vehicle’s positive battery terminal and the other to the black wire on your old thermostat’s wiring diagram. Ensure that both ends of the wire are correctly and firmly attached.
  3. Connect one end of the wire harness to the green wire on your new thermostat’s wiring diagram, and ensure that both ends of the wire are firmly attached.
  4. Connect one end of the power supply to your new thermostat’s connector and turn it on by pressing its power button until it turns blue (or green if using water heating). Let it operate for at least five minutes before testing it by turning up your heat setting in increments until you reach the desired temperature.
  5. Test the new thermostat by turning on your heat and setting the desired temperature. If everything is working correctly, you can remove the old thermostat.

What Does E1 Mean on a Dometic RV Thermostat?

The E1 code on a Dometic RV thermostat is used to signify the electrical input for the thermostat. The thermostat will only operate when an AC voltage is present at this specific connector. If your RV doesn’t have an E1 connector, you’ll need to replace the thermostat with a model with this feature.

Does a Dometic RV Thermostat Have a Battery?

A Dometic RV thermostat has a battery. This battery keeps the thermostat operational in case of an electrical outage.

What Happens if You Wire a Thermostat Wrong?

If you wire a thermostat wrong, it can cause your RV to overheat and possibly catch fire. When wiring a thermostat, connect the black and red wires, hot and neutral wires, and white wires to the ground. Contact a professional installer if you have any questions about wiring a thermostat.

Where Is the Model Number on a Dometic Thermostat?

The model number is typically on a sticker on the back of the thermostat.

Are RV Thermostats 12 Volts or 24 Volts?

The majority of RV thermostats are 12 volts. Some are 24 volts, but they are not as expected. If your RV has a 24-volt system, you will need a 24-volt thermostat. If your RV has a 12-volt system, you will need a 12-volt thermostat.

Are RV thermostats 12 volts or 24 volts?

Troubleshooting Tips for a Dometic RV Thermostat

If you are having trouble with your Dometic RV thermostat, there are a few troubleshooting tips that you can do. First, check to see if the thermostat is working by turning it on and off. If the thermostat is not responding, you may need to replace it. Second, check to see if any power is going to the thermostat. If no energy goes to the thermostat, you may need to replace the wiring between the thermostat and the controller. Finally, troubleshoot whether or not the temperature is set correctly by checking the settings on your controller.
If none of these tips work, you may need to replace the thermostat.


Like most people, you’re probably wondering what is going on with your RV thermostat. Maybe you’ve been having problems with it for years, or perhaps it just stopped working, and now you need to fix it. Whatever the case, this guide will help you understand all about Dometic RV thermostats and their wiring diagram. From there, hopefully, you’ll be able to get your thermostat repaired or replaced without any hassle!

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