EasyTouch RV 355 Manual
5 
©2022 Micro-Air Corp    March 15, 2022, revision 1.10 
Wiring the thermostat 
  Original thermostats can have a plug-in connector or be direct wired to the RV manufacturer’s 
wiring. Thermostats wired with a plug can simply unplug the original plug and plug in the EasyTouch 
thermostat. Wired thermostats require the optional connector which can be ordered with the 
thermostat or ordered separately. 
To wire the connector models, match the original thermostat wiring colors to the connector 
colors. Please note that manufacture wiring from the wall may not match the colors until it joins with 
the wiring stub from the original thermostat. See Table 1 for details on the colors used with the 
thermostat and the function of the wires. 
Note: See Appendix C: 9430-334 wiring for a different wiring table when replacing model number 9430-
334.   
Table 1 
Original 
thermostat wire 
color 
Micro-Air harness 
color 
Function 
Factory harness color 
(Provided to write in your 
color) 
2- pin 
connector
Purple 
Purple 
Signal 1 
Black 
Black 
Signal 2 
9-pin connector
Green 
Green 
Heat 4 
White 
White 
Heat 1 
Blue 
Blue 
Ground in 
Red/White stripe 
Red/White stripe 
+12 VDC out 
Red 
Red 
+ 12 VDC in 
Blue/White stripe 
Blue/White stripe 
Ground out 
Orange 
Orange 
Heat 2 
Yellow 
Yellow 
Heat 3 










