No, not another thread on how to install a Honeywell thermostat on a basic setup, I have a situation here! I've installed digital thermostats on our last 2 TT's, but this one through me for loop.
2011 FR Surveyor SP275
Dometic LCD Thermostat:
The thermostat has 3 wires, red 12+, white 12-, and blue wire marked common
using a test light, and crossing the red and white wires, they have constant power regardless if the system is dormant or a system is running.
I traced the wires to the A/C unit where the control box is at. You can see the red/white/blue wires in the brown loom on the left of the photo. At the upper -middle of the pic, you can see a second brown loom w/ red/white wires: they go back to the furnace.
The wiring diagram for the control unit is located on the lid:
Is there anyway to replace the dometic LCD thermostat? I just can't believe it doesn't show the current temp!!!!
Any advice is appreciated.