DOMETIC RV Air Conditioner Cool Furnace Thermostat User Guide

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Dometic Thermostat Guide  

This process document corresponds to the YouTube video Dometic RV Thermostat Basics.  

Please watch this video for visual understanding of the process. If you are getting started, some  

of the items shown are available on our Amazon storefront. If this process is of value, we  

appreciate you starting your shopping from our store. You can also support our efforts by using  

the THANKS button under the YouTube video.  

Turning the Thermostat on/off, display temp, switch between F/C  

To turn the thermostat on, press the Mode button.  

To turn the thermostat off, continue pressing the Mode button until “Off” appears on the  

screen.  

After 15 seconds of illumination, the screen turns off.  

With the thermostat off, press either the Up or Down button to display the temperature.  

Simultaneously press the Up and Down buttons to toggle the screen between °F and °C.  

Setting the Fan Speed (Fan Mode)  

Fan mode provides three speed settings:  

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Low – Fan operates continuously at a low speed.  

High – Fan operates continuously at a high speed.  

Auto – Fan and compressor cycle on and off and the speed varies based on room  

temperature and temperature setting on the thermostat. When the temperature  

difference between the room and the thermostat is:  

o >5 °F (-15 °C), the fan operates at a high speed  

o <4 °F (-15.5 °C), the fan operates at low speed  

To change the fan speed  

1. Press the Mode button until the Fan icon appears.  

2. Press the Up or Down button until the desired fan speed appears on the screen.  

Setting the Temp  

Press the Mode button until you see your desired mode on the screen.  

Press the Up and Down buttons until you reach your desired temperature setting.  

Let’s go over a few basic use cases:  

1. Setting the A/C for overnight sleeping with continuous fan:  

a. Tap the Mode button to Fan and select Low  

b. Tap the Mode until Cool appears  

c. Tap the down arrow until 66 degrees appears  

The Low fan will remain on and the A/C compressor will cycle on until the temperature  

is at 66 degrees. The A/C compressor will turn off once the required temperature is  

reached. Be aware that it will go a few degrees below what is set before the compressor  

stops. However, the fan will remain on Low.  

2. Get the furnace going on a cool morning:  

a. Make sure your propane tank valve is open and that you have propane in the  

tank.  

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General	Details
Name	DOMETIC RV Air Conditioner Cool Furnace Thermostat User Guide
Make	Dometic
Language	English
Filetype	PDF (Download)
File size	0.1 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Dometic

DOMETIC RV Air Conditioner Cool Furnace Thermostat User Guide Overview

Summary of Contents

• Page 1: Dometic thermostat guide This process document corresponds to the YouTube video Dometic RV thermostat basics. To turn the thermostat on, press the Mode button. To turn the thermostat off, continue pressing the Mode button until “Off” appears on the screen. Fan mode provides three speed settings: Low, High, and Auto. To change the fan speed, press the Mode button until the Fan icon appears. Press the Mode button until you see your desired mode on the screen. Setting the A/C for overnight sleeping with continuous fan involves selecting Low fan and setting the temperature to 66 degrees. The A/C compressor will turn off once the required temperature is reached. Make sure your propane tank valve is open and that you have propane in the tank to get the furnace going.
• Page 2: Dometic thermostat guide Tap the Mode button to Fan and select Auto. The overhead fan only comes on when the A/C compressor comes on. Tap the Mode button twice to get to the Furnace. Set the temperature to 80 degrees. The furnace fan will come on and then a clicking sound before the furnace fires up. To run the overhead fan while the furnace is on, change the AUTO fan setting to Low or High. Leaving the A/C on while out on a warm day: Tap the Mode button to Fan, then select Auto. Change the selected temperature to 80 degrees. The A/C compressor will cycle on when the trailer gets above 80 degrees. For sleeping during colder evenings, set the fan to Low and the furnace to kick on at 55 degrees. Ensure nothing is in front of the furnace overnight, and the furnace exhaust can be very hot outside the trailer. Error codes include E1 for loss of communication, E2 for open circuit or out of range indoor temperature sensor, and E3 for shorted indoor temperature sensor.