Rv Dometic Thermostat Problems : Causes And Solution

Rv dometic thermostats are key components of a typical rv air conditioning and heating system. However, like any other technology, they are not immune to issues.

A few common rv dometic thermostat problems include the thermostat not turning on, incorrect temperature readings, and difficulty in setting or adjusting the temperature. These issues can be frustrating, especially when you’re on a camping trip and relying on your rv’s temperature control system to keep you comfortable. But, fret not, many of these problems can be fixed relatively easily.

Common Rv Dometic Thermostat Problems

The dometic thermostat is an essential component in the rv that regulates the temperature and controls the heating and cooling system. However, like any other device, it can sometimes pose challenges. Here are some of the most common problems that you may encounter with a dometic thermostat.

Incorrect Temperature Readings

One of the significant issues with the dometic thermostat is the incorrect temperature readings. It can be frustrating when the device shows the wrong temperature, making it challenging to regulate the rv’s interior climate.

  • The sensor is faulty or dirty.
  • The thermostat is not calibrated correctly.
  • The thermostat is installed at an incorrect location.
  • Wiring issues.

Difficulty In Adjusting Temperature

Another issue that rv owners face with the dometic thermostat is difficulty adjusting the temperature. It can be challenging to set the desired temperature, especially when the device is not responding appropriately.

  • Batteries in the thermostat are running low.
  • The thermostat is not communicating correctly with the furnace or ac unit.
  • The thermostat is damaged or faulty.

Ac Or Furnace Not Turning On/Off

When the furnace or ac unit is not turning on/off, it can make the rv environment uncomfortable. It is one of the most common issues with a dometic thermostat.

  • The thermostat is not set to the correct mode.
  • Wiring issues.
  • The thermostat is not communicating correctly with the furnace or ac unit.
  • The furnace or ac unit is faulty.

Display Screen Not Functioning Properly

Lastly, the display screen not functioning correctly is another common problem with the dometic thermostat. A malfunctioning display screen can make it difficult to monitor and adjust the temperature.

  • The display screen is damaged.
  • The thermostat is not receiving sufficient power.
  • The device is faulty.

The dometic thermostat, like any other device, can have its fair share of problems. With this guide, you can troubleshoot some of the most common issues you may face when using a dometic thermostat in your rv.

How To Troubleshoot Rv Dometic Thermostat Problems

Rv dometic thermostat problems are a common issue that rvers frequently encounter. These issues can range from temperature inaccuracies to control board problems, and from relay or wiring issues to display screen failure. If you’re experiencing any of these problems with your dometic thermostat, don’t worry.

Here is a step-by-step guide to help you troubleshoot and fix some of the most common rv dometic thermostat problems.

Step-By-Step Guide To Diagnose The Problem

To troubleshoot the problem with your rv dometic thermostat, follow these steps:

  • Check the thermostat’s settings: ensure that the settings are appropriate for your rv’s temperature needs.
  • Check the fuse and circuit breaker: ensure that the fuse and circuit breaker for the thermostat is not tripped.
  • Clean your thermostat: dust and dirt can accumulate on the thermostat. Clean it regularly to ensure accuracy.
  • Check the dip switches: incorrect dip switch settings can cause inaccurate temperatures. Double-check the dip switch settings to make sure they are calibrated correctly.

Steps To Fix Temperature Inaccuracies

If your rv dometic thermostat is displaying inaccurate temperatures, you can take the following steps:

  • Calibration: use a thermometer to check the room temperature and compare it with the thermostat reading. If there is a significant difference, you can calibrate the thermostat.
  • Relocate the thermostat: if the thermostat is located in an area that is not representative of the rv’s temperature, consider relocating it to a more accurate location.

Steps To Fix Control Board Issues

If you’re experiencing control board issues with your rv dometic thermostat, follow these steps:

  • Check the wiring connections: check the control board wiring connections for any loose or damaged wires.
  • Replace the control board: if the control board is damaged, it needs to be replaced. If you’re uncomfortable with diy replacement, contact a professional.

Steps To Handle Relay Or Wiring Problems

If you’re experiencing relay or wiring problems with your rv dometic thermostat, follow these steps:

  • Check the wiring connections: ensure that all wiring connections are secure and undamaged.
  • Check the relays: if the wiring connections are fine, check the relays to see if they are functioning accurately.
  • Replace the relays: if the relays are not functioning accurately, they need to be replaced.

Steps To Deal With Display Screen Issues

If you’re experiencing display screen issues with your rv dometic thermostat, try the following steps:

  • Power cycling: power cycling involves removing either the thermostat’s batteries or the rv’s power source for a few minutes before reconnecting.
  • Soft reset: some thermostat models allow you to perform a soft reset using the manufacturer’s instructions.
  • Hard reset: if the soft reset doesn’t work, perform a hard reset. This will return the thermostat to its factory settings.

These are some of the steps that you can take to troubleshoot and fix common rv dometic thermostat problems. By following the above steps, you can save time and money by avoiding the need for professional help.

How To Prevent Rv Dometic Thermostat Problems

As an seo-friendly content writer, i have researched and gathered useful information regarding rv dometic thermostat problems and their solutions. In this blog post, we will focus on ways to prevent rv dometic thermostat problems to ensure that your rv’s heating or cooling system runs smoothly.

Regular Maintenance Suggestions To Prolong Thermostat Life

Regular maintenance is essential to prolong the life of your rv’s dometic thermostat.

  • Check the thermostat’s batteries frequently and replace them when needed.
  • Clean the thermostat’s interior and exterior portions regularly to prevent dust and dirt build-up.
  • Make sure that the thermostat’s wiring is securely connected and not damaged in any way.
  • Keep the thermostat away from moisture and direct sunlight.

Common Errors To Avoid

Sometimes, rv owners make mistakes that can lead to thermostat problems.

  • Avoid touching your thermostat with wet hands.
  • Do not attempt to fix thermostat problems unless you know what you are doing.
  • Do not allow pests, such as rodents, to nest in your rv’s thermostat.

Importance Of Professional Inspection

Even with regular maintenance and avoidance of common errors, it is still essential to have your rv’s dometic thermostat professionally inspected periodically.

  • A professional technician can identify and fix any issues before they become severe and cause heating or cooling problems.
  • Professional inspection ensures that all the components of your rv’s thermostat are working correctly.
  • It’s better to invest in professional inspection to prevent expensive repairs or replacements later on.

Regular maintenance, avoidance of common errors, and professional inspection are crucial in preventing rv dometic thermostat problems. By following the suggestions mentioned above, you can prolong your rv’s thermostat life, prevent common errors, and avoid expensive repairs or replacements in the future.

FAQ On Rv Dometic Thermostat Problems

What Are The Common Rv Dometic Thermostat Problems?

Dometic thermostat problems include sensor failure, wrong wiring installation, and faulty temperature sensors.

How Can I Fix My Dometic Thermostat?

You can fix dometic thermostat by checking the wiring installation, ensuring power supply, and replacing faulty parts.

How Often Should I Replace My Dometic Thermostat?

Replace your dometic thermostat when it shows signs of failure or after every five years.

Why Is My Dometic Thermostat Not Working?

Your dometic thermostat is not working due to power supply issues, wrong wiring installation, and faulty parts.


Rv dometic thermostat problems can be frustrating and inconvenient for rv enthusiasts. It is important to identify the root cause of the issue and seek professional assistance to resolve the problem. Proper maintenance and regular checkups can also help prevent any potential thermostat malfunctions.

With the right care and attention, rv owners can ensure the smooth functioning of their thermostats and enjoy a comfortable living experience on the road.

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