analog to digital thermostat conversion

No. Many dts are powered by their own batteries.

He doesn't know what he's doing.
The digital stat hooks up and works just like any home unit does. It will not use the constant power source that RV stats usually do.

Here is a Coleman T-stat information guide.....what you have vs what will replace it

https://www.makariosrv.com/content/Makarios%20RV%20Coleman%20Thermostat%20How%20To%20Replacement%20Guide.pdf


Your A/C Unit, t-stat and furnace are all 120V AC (park model vs DC RV Model)

those dealers sure do know their stuff. :S

I'm guessing here, but I think we need to know if you HVAC system, the Coleman A/C + the Atwood Furnace, are being run like an RV (on 12VDC) or like a house (24VAC Transformer).

Have you looked at the back of the thermostat? Like How Many Wires? Which Colors? Any Terminals Marked? Any extra wires, not connected? Their Colors?

Can you post pix of both sides of the thermostat?

The chart linked from Makarios RV, presumes you know the T'Stat is a Coleman, and you can ID its number. Probably not too helpful unless you find a number or somebody recognizes yours from a picture and can provide that number.

BUT!!! Still call or email Makarios. I needed a part, for something totally unrelated to HVAC and T'Stat's. They sourced it for me, for free. By that I mean I didn't buy anything from them, their help was free and spot on, and the part (from another supplier) was exactly what I needed, free, and promptly delivered.

If Makarios can put you in a Coleman Digital T'Stat for $50 like the one I tracked from their example, that's a very good price. Basic home T'Stat's are around that price. WalMart used to have a $20 Honeywell that a lot of us used in our 12VDC-controlled HVAC, but I think it's not only no longer carried at WM, but also discontinued by Honeywell. Maybe too many of us were having too much fun going digital for $20!

Our $20 Honeywell 7-day programmable stats came from Home Depot.

OP has a Park Model....they don't have DC System/ALL AC powered
OP has a Coleman Model 46413-813 A/C unit.....120V AC Unit
OP has a Atwood 8900-iii series....which come in 120V AC versions

Just saying......

It really shouldn't matter if it is a DC or AC system should it? All of the AC systems in a bricks and sticks home can use some form of a digital thermostat.