Replacement For Dometic 3316410.012 Thermostat
Updated 12/09/2025 | Published 11/25/2025
Question:
The Dometic thermostat, 3316410.012 does not appear to be working in my RV. It is a three wire thermostat. Is there a test for that thermostat. Do you have a replacement? I have heater DFSD20141.
asked by: Robert A
Expert Reply:
Hi Robert; the correct replacement for your 3316410.012 is the Replacement Single Zone Thermostat for Dometic RV Air Conditioners # DMC79FR. When you say it is not working what exactly do you mean? If the screen isn't turning on you can use a tester to make sure you have 12V power running to the thermostat.
If it appears to be functioning, but the heat is no longer kicking on, you can check that wire as well to make sure the signal is sent to the thermostat. I would test at the thermostat and then the furnace itself so you can narrow it down if there is a short in the wiring.
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Product Page this Question was Asked From
Replacement Single Zone Thermostat for Dometic RV Air Conditioners - Black
- Accessories and Parts
- RV Air Conditioners
- Thermostat
- Black
- Dometic
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Robin H.
12/8/2025
Hey Robert, how did things go after testing the power and signal wires on your Dometic thermostat? Did the replacement thermostat end up fixing the issue with your heater? Your update could make it easier for the next person troubleshooting the same problem.