The blower motor will turn on if connected directly to L1 instead of the blower relay. I replaced the relay but the problem still persists.
Some digging around with a multimeter revealed I was getting 0V inside at the thermostat on the red wire (and between every pair of conceivable wires) and 0.35V outside on the output of the transformer (should be 24V?). The inputs read 120V as I think they should.
I disconnected the transformer from everything and checked the resistance between COM and 240 = infinity ohms, COM and 208 = ~50s ohms and between the outputs = 0 ohms. Does the infinite resistance imply the transformer is toast?
The outside fan and condenser are working and the 3amp fuse seems to be intact. My multimeter can't measure capacitance, but I did disconnect the blower run capacitor and watch resistance continuously rise to inf.
wiring diagram of unit: http://enora.nordyne.com/Literature/710340a.pdf
my attempt to reflect the reality of my unit:http://i.imgur.com/aFCOyfb.png
my unit in general:http://enora.nordyne.com/Literature/707877g.pdf
I would appreciate any advice in general on how to further troubleshoot this. I'm also curious as to whether just leaving the blower motor directly connected to L1 and bypassing the blower relay altogether would have negative consequences? I'm OK with the AC always on and turning the whole unit on/off via the breaker for the time being -- it is summer in Florida.
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