How to Change the Dometic Digital Thermostat Furnace Control Only to Fahrenheit

Updated 11/25/2025 | Published 11/13/2025

Question:

Is there a way to switch the temp reading from C to F?

asked by: Tim M

Expert Reply:

There sure is Tim, this is America! You'll need to pull the faceplate of the Dometic Digital Thermostat item # DMC84RR off of the wall. If you look on the back of it you'll see a bunch of circuits but on the left side there's a button you can press (it's circled in the pic below). Go ahead and press it down until the display shows P01. Then release the button and turn the knob clockwise until the display shows P05. You'll press that button again and the display will show C. You'll want to turn the button clockwise to F. You'll need to wait 15ish seconds and then it'll display the temperature in Fahrenheit.

If you have any additional questions, go ahead and click on the box below that says Reply to Jerred H and I'll be happy to answer them.

expert reply by: Jerred H