General Boards > Redecorating and Updating your Motorhome

wall thermostat

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William Brosam:
anyone upgraded the thermostats in their coach lately?

my neighbor in his trailer has a cool remote for his and its only 4 years newer then our coach.

anyone changed out the duo-therm wall thermostats for something more modern?

Dick Simonis:
Yes, I installed two White Rodgers digital thermostats (P/N 1F83-277) that work like a champ.  Even makes fan speed automatic.

These were designed for heat pumps which is, I reckon, why they have the two speed fan capability.

Here is my original post regarding the modification.:

http://forum.bacrallies.com/m-1331740914/s-0/highlight-thermostat/#num0

Richard And Babs Ames:
We replaced the 13500 BTU  Dometic AC units with 15000 BTU heat pumps and went from the old mechanical thermostats to the Dometic digital ones. We now have a chocie of two heat sources. This was on our 1997 Beaver.

Keith Cooper:
Dick, after looking at your earlier post regarding the White Rodgers digital thermostats (P/N 1F83-277) the white rogers wiring instructions and the Duo-Therm wiring, it looks like you are saying :
Y............... Compressor Relay = (Green) Cool on Duo Therm
Y2.............. 2nd Stage Compressor = (Blue) Hi Fan on Duo Therm
W/E.............Heat Relay/Emergency Heat Relay = (White) Furnace on Dou Therm
G.................Fan Relay  = (Orange) Fan on Duo Therm
C...............Common wire from secondary side of cooling system transformer or heat only system transformer = (Black) ground on Duo Therm

That leaves us with the Red wire for 7.5V on the Dou Therm. Are you saying it should be connected to RH and jumpered to RC?

Dick Simonis:
I'm not using the hot wire, just the battery.  Although the chap that originally posted claims he hooked up the hot wire to the (R) low voltage in and it worked just fine but I've been happy using the battery and it's on it's second year without replacements.  I suspect the circuit board takes the normal 24 VAC and steps it down to a 5 VDC or so to power the functions so it might indeed work.

However with the good battery life I didn't see a need to do so unless I wanted the display to be always on vs. intermittent when a button is pushed.

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