I have a honeywell thermostat , model RTH221B. Can this be installed in a fifth wheel RV. My wires on the old one are air- blue, white, green, yellow. The heater has green, greenblack. The new one has a port connection for B,O,G,Y,W,R,RC. Please advise me how to connect the wires.

The last camper I worked on worked on a 12 volt power system. (its been several years), I had to get a special 12 volt tstat,, a house tstat works on 24 to 27 volts,and couldn`t be used in camper

Quote:

---

Originally Posted by wmproop

the last camper I worked on worked on a 12 volt power system. (its been several years),,I had to get a special 12 volt tstat,,,a house tstat works on 24 to 27 volts,and couldn`t be used in camper

---

Thanks for the information. I will get one from the RV store.