The quickest way to change your Dometic thermostat temperature scale

Most Dometic thermostats switch between Celsius and Fahrenheit through a settings menu you reach by holding a button for a few seconds. The exact steps depend on your model — some use a dedicated settings button, others use the up or down arrow — but the process takes less than a minute once you find the right button combination.

The most common method across Dometic models is to hold the Mode or Set button for three to five seconds until you see a menu appear on the display. From there, you navigate to a Units, Temperature, or Display option and toggle between C and F. If that does not work, try holding the up arrow or down arrow button instead, or check the label on the back of the thermostat itself — many models print the button sequence right there.

Key Takeaways

  • Hold the Mode, Set, or arrow button for three to five seconds to enter the settings menu on most Dometic models.
  • Look for a Units, Temperature, or Display option in the menu and select it to toggle between Celsius and Fahrenheit.
  • If the standard method does not work, check the back or bottom of the thermostat for a printed quick-reference guide specific to your model.
  • Some older Dometic models may require you to access settings through a different sequence — consult your manual if the common methods fail.

Finding the settings menu on your specific Dometic model

Dometic makes several thermostat lines, and the button layout varies. The Dometic Single Zone and Dometic Multi Zone models are the most common in RVs and small appliances. On the Single Zone, hold the Mode button until the display flashes or shows "SET" — this is your entry point to the menu. On the Multi Zone, the process is similar but sometimes requires holding the up arrow instead.

Once you are in the menu, use the arrow buttons to scroll through options until you see something labeled Units, Temp, or Display Settings. Press Mode or Set again to select it. You should then see C and F as choices. Select F for Fahrenheit or C for Celsius, then press Mode or Set once more to confirm and exit the menu.

If your display shows nothing after holding a button, try a different button. Some models respond to the down arrow or a combination of buttons pressed together. The manual that came with your thermostat will show the exact sequence for your version.

What to do if you cannot find the settings menu

If none of the standard button combinations work, the first place to check is the back or underside of the thermostat itself. Many Dometic models print a quick-reference card or label with the button sequence for that specific unit. Look for text that says "Settings," "Menu," or "Display Mode" and follow the steps listed.

If there is no label, you can search for your model number online — it is usually printed on the back or inside the battery compartment. Dometic publishes user manuals for most models on their website, and the manual will include the exact button sequence and menu structure. You can also contact Dometic customer service with your model number, and they can walk you through the steps over the phone.

Why the temperature scale matters for your RV or appliance

If you live in or travel to a country that uses Celsius, or if you straightforward prefer that scale, switching your display makes reading the thermostat faster and reduces the chance of setting the wrong temperature. The actual heating or cooling function does not change — only what the screen shows you. Once you switch to Fahrenheit or Celsius, the thermostat remembers that choice and will display in that scale every time you turn it on.

Some people switch back and forth depending on where they are traveling. If you do this often, it is worth writing down the button sequence for your model so you do not have to hunt for it each time.

Common mistakes that prevent the menu from opening

The most frequent mistake is not holding the button long enough. Many people press and release quickly, expecting the menu to appear when ready. Dometic thermostats usually require a solid three to five second hold — count slowly to five while keeping the button pressed. If you release too early, nothing happens.

Another common issue is pressing the wrong button. If you have a model with multiple buttons, try each one in turn while holding for the full five seconds. Some models use the up arrow, some use Mode, and some use Set. It is worth trying all three if the first one does not work.

A third reason the menu might not open is a low or dead battery. If the display is dim or flickering, replace the batteries first, then try the button sequence again. A weak battery can prevent the menu from responding even if you press the button correctly.

Confirming the change was saved

After you select Fahrenheit or Celsius and press the confirmation button, the display should return to the main screen and show the current temperature in your chosen scale. If it still shows the old scale, the change did not save. This usually means you did not press the confirmation button, or you exited the menu before the change was recorded.

Go back into the settings menu and repeat the process, making sure to press the Mode or Set button a final time after selecting your temperature scale. Once the main display shows the correct scale, the setting is saved and will remain even after you turn the thermostat off.

Frequently Asked Questions

Will changing the temperature scale affect how hot or cold my RV gets?

No. Changing the display from Celsius to Fahrenheit only changes what the screen shows you. The thermostat still heats and cools to the same actual temperature — you are just reading it in a different unit. If you set it to 72°F, that is the same as 22°C, and the appliance will reach the same temperature either way.

What if I change it to Fahrenheit but the display still shows Celsius?

The change did not save. Go back into the settings menu, select the temperature scale option again, choose Fahrenheit, and press the confirmation button one more time. Make sure you hold the initial button for the full three to five seconds and do not release it early.

Can I change the scale without the manual or model number?

Yes. Try holding the Mode button for five seconds, then use the arrow buttons to find Units or Display Settings, and toggle between C and F. If that does not work, try the same process with the Set button or the up arrow. One of these combinations works on nearly all Dometic models.

Does the thermostat remember the scale if I turn it off?

Yes. Once you change the display to Fahrenheit or Celsius and confirm the change, the thermostat saves that setting. It will show the same scale the next time you turn it on, even if days or weeks pass in between.