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©2021 Micro-Air Corp
July 1, 2021, revision 1.8
Wiring the thermostat
Note: Early models of EasyTouch RV 355 thermostat have wires going from the thermostat to both
interlocking connectors. See Appendix B for details on wiring this model. Later models have the nine-
pin connector mounted on the control board. This section will assist in wiring these models.
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.
Micro-Air provides a connector to directly wire these thermostats to the wiring if the
manufacturer has directly wired the thermostat. Match the original wiring colors to the provided
EasyTouch connector colors to install the thermostat. See Table 1 for details on the colors used with the
thermostat and the function of the wires.
Note:
See
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
-
p
in
co
n
n
ect
o
r
Purple
Purple
Signal 1
Black
Black
Signal 2
9
-p
in
c
o
n
n
ect
o
r
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
