Can Dometic Gas Propane RV Furnace Run On Shore Power Without 12V Battery?

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Question:

I saw the DMC99MR says 12V DC power. Does that mean I can’t run it on shore power without a battery? Sorry I'm just confused here. thank you, steve

asked by: Steve

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Expert Reply:

Steve, that’s an important detail, and it can be confusing.

The furnace blower and controls on most furnaces, such as the # DMC99MR (white door) or # DMC64MR (black door), are 12V, so most folks think you need a battery in the system even on shore power. However, your RVs converter will power the 12v fuse block in the panel without a battery, so you'll be fine to use the furnace without a battery installed.

Do you currently have a decent deep-cycle / marine battery?

expert reply by: Andrew N

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Answer 1

From left to right the 3 wires on the Dometic CT Thermostat like the #DMC79FR are 12V-, Comms, and 12V+. I have attached a wiring diagram below for your reference.

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Answer 2

Hey David, it sounds like you know what you're doing but I've also gone ahead and found the wiring diagram for the Replacement Single Zone Thermostat for Dometic RV Air Conditioners #DMC79FR for you to check out so you can use it as a cross…

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Answer 3

Hello Roy, You will need a whole new set-up. I am sure that is not the answer you were hoping for, but I have a great explanation. The Air Conditioner refrigerant went from the R410a to the R32 this year. The new R32 is much more efficient making it…

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Answer 4

Hey Harvey! Definitely a valid question - I'd hate to invest in something and run the risk of something happening to it. The Portable Power Watchdog Surge Protector #HU42VR has a loop at the bottom of the door that covers the connection so you…

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Answer 5

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Answer 6

Hey Donald, Nope! The Bluetooth/WiFi app is free to download and free to use with the portable Watchdog Surge Protector #HU42VR. There will be a QR code on the front of the surge protector that you simply scan and it will get you all set up. I have…

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Answer 7

For the best and largest slip-on towing mirrors we carry for your 2022 Ram 1500, I recommend the CIPA Custom Towing Mirrors - Slip On - Driver Side and Passenger Side #CIP98MR. Apart from the fact that these mirrors provide you with the largest…

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Answer 8

Hello Troy, You can most definitely order just the passenger side mirror for the CIPA Custom Towing Mirrors - Slip On - Driver Side and Passenger Side #CIP98MR. You will want to order the CIPA Custom Towing Mirror - Slip On - Passenger Side #CIP32VR.…

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Answer 9

Hello Sam; that is a great question! I reached out to Furrion and you will be able to use the Furrion Chill Cube #FR69TD (white) or #FR49TD (black) with your furnace. However, the remote is not capable of operating the furnace at this time. Also, we…

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Answer 10

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Answer 11

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Answer 12

Hey Jon; I was actually just talking to Furrion about heat options for the Chill Cube yesterday (1/21/2025). At this time, the only way to have heat with this unit is through a furnace on a ducted setup. The Furrion Chill Cube RV AC w/ Air…

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Can Dometic Gas Propane RV Furnace Run On Shore Power Without 12V Battery?

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