Options For Replacing Advent Analog Thermostat ACTH11B
Updated 10/22/2025 | Published 09/17/2025
Question:
We have 2014 Dutchmen Denali 289RK and wanted to replace our thermostat Advent acth11b, what would be the ideal replacement? Thank you
asked by: Richard E
Expert Reply:
Hello Richard, thanks for reaching out. The ACTH11B is the old Advent analog thermostat which has been discontinued. The only way to upgrade to a digital thermostat would be to replace your controller and distribution box as well. That said, the ACRG15 distribution box you would need has also been discontinued. RV air conditioners now use the new R32 refrigerant, and the old r410a models like the ACRG15 are no longer being made. That leaves you with two options.
You can see if you can find a used ACTH11B thermostat elsewhere online. If that is not possible, the only solution I can offer would be to replace your whole AC system with a new R32 unit. This would mean replacing the rooftop unit, distribution box, controller and thermostat. For that, the Advent # ADV62SR is what I recommend.
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Jesse M.
10/22/2025
Hey Richard, did you end up finding a used ACTH11B thermostat or decide to go with the new Advent AC system? Knowing what route worked for you could help others facing the same upgrade choice.