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ropeguru
Premium
join:2001-01-25
Mechanicsville, VA
reply to mackey

Re: Thermostat Install Help

ON my system, and I forgot to mention it, there is no outdoor thermostat that I know of. Inside the air handler there is w1, w2, and w3 in which w2 and w3 are tied together.

I saw the section you are referring to about ODT-A and ODT-B which as far as I know I don't have either one. THey refer to an external unit for the ODT and I do not have that. I will do some more research on that and see what I can come up with.


mackey
Premium
join:2007-08-20
kudos:12
The ODT is most likely built into the outside unit. If you follow the wires and both W1 and W2 go to the defrost board, then it's somewhere in there.

/M


ropeguru
Premium
join:2001-01-25
Mechanicsville, VA
Thanks... I am guessing that the ODT-A is internal to the outside unit and that ODT-B would be the external unit in a waterproof enclosure they were talking about.