Dometic AC Zone 2
My rear ac/furnace, zone 2, will not show on the thermostat. With the 110 AC breaker on, the AC runs with no control. I have tested 12 volt at the thermostat, purchased a RJ11 tool and ran a control l...
Forum Discussion
Do the fan and mode buttons work OK? Those buttons get flakey. There are several things you could try- disconneting zone 2 and switching zone 1 to zone 2, then see if it shows up. I would still try hooking it direct to zone 2- remembering to reinitialize every time:
This from this pdf of 4 button troubleshooting.
The reset procedure is as follows:
a. Turn the ON/OFF switch to ON. The display light with
data should come on. If the light and data are not there,
see Section B2 Cable Assembly.
b. Depress mode to activate display light.
c. Depress the bottom two buttons (up & down) together.
d. While still holding the two buttons add the third from the
bottom (mode) , hold all three for a few seconds.
e. Release the third (mode) button.
f. Release the bottom two (up & down) together.
g. Depress the mode button. The display light should be
off. If not, repeat steps 2 through 6.
The control should return to the default setting of 68oF for
heating mode and 72oF for cooling mode.
This from this pdf of 4 button troubleshooting.
