Join Date: Jan 2004
Location: Lincoln.NB Pop 492,823
RV Duo Therm thermostat to any digital conversion...problems.
For those with any RV's be it a motor-home, 5th wheel or pod trailer, especially if it was made before 2005, you know the thermostats I'm talking about. Small little thing with a slider, hi/lo fan and heat/cool switch. That's it.
Well I have watched, read, thought I understood, about how to replace the "analog" to an electronic. I just have failed.
To make things worst, the colors I have aren't anything like any videos I have seen.
So here is my dilemma. For those who don't know, RV's don't have a C wire to supply 24Vac, at least mine doesn't so it needs to run on backup batteries, which is fine by me.
This is what my Duo Therm looks like. I have written the colors but don't go by the colors to try to match something.
RED - 7.5 (I thought it was 7.5 volts but I see no reading on a multi-meter)
Yellow - Cool
White - Furnace
Blue - Hi Fan
Brown - Fan
Green - Gnd
Now on my Focus Pro 5000 by Honeywell, which is the thermostat of choice, I thought, has the following pinout:
Rc - Power
R - (Rc+R joined by jumper)
Y - Compressor Contactor
C - 24vAC common
W- Heat relay
G - Fan relay
As you can see, there isn't much to compare, at least to me it doesn't look like it. Can anyone tell me what could go from which connector to which?
Right now, I have heat working but nothing else. I also can't change the speed of the AC fans unless I ground the Blue and The green together. This is driving me insane!!!!
Home Theatre: Yamaha HTR-6190, Klipsch Speakers, SANYO PLV-Z4, TOSHIBA HDDVD, LG BD555C, Cerwin Vega HTS12 Sub, VIP2300, XBox 360, HTPC.