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5 wires and no common / Ecobee setup

2 months ago
last modified: 2 months ago

I have an older mobile home heat pump setup with emergency electric heat coils. i want to install an ecobee pro but i have 5 wires at the thermostat and not one ove them seems to be a common, also the air handler has no board and only 4 wires going in ( the yellow bypass the handler) and the white wraps around the E and ends at w2. i am stummped

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