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Wires are as you indicated.
Fan runs just fine with the wire removed.
Yes sir that is the one.
If you are referring to the 8 or 10 gauge wire that leads to the breaker then yes the fan still runs with this wire removed from the sequencer.
Ok, the purple wire from the sequencer is the other end of the purple wire we unplugged at the board. Am I supposed to have more than one wire unplugged at this point? I've been plugging wires back in after each test.
Alright, the fan still runs with the purple removed from the sequencer.
Ok it's been well over an hour and I need to get off of here for dinner. I'd like to take this up tomorrow but not sure how. Please let me know.
Maybe go back and reread the original post and what we have done so far. System is in auto and fan is in auto. House is 66 and the heat setpoint is 62. Heatpump is switched off at the breaker. If I energize the furnace with the breaker the heat strip and the fan come on even if it is 80 in the house. We have disconnected the purple wire from first the board and then the sequencer which was essentially the same test and the fan still runs. I have assumed from the beginning that the fan comes on because the heat strip comes on. I can shut the system off at the tstat and it continues to run or even remove the tstat from its backing plate so all I have is wires hooked to their terminals and it continues to run. A voltage test to these terminals while the fan is running shows 27.4 volts to R & the jumpered Rc. .475 to the G or fan terminal and 0 volts to all other terminals. Reminder; The tstat, sequencer and fan relay are all new having been changed out one at a time.
The only white wire comes from the sequencer and is wire nutted to the white and black wires from the tstat and a blck 24 vac wire going to the heat pump. The white 24 vac wire in the harness going to the heat pump is not connected at either end. And as a side note; this issue occurs with the heat pump on or off at the breaker box.
Across the top I'm getting 1.75 V and across the next terminal down (red wires going to element) I'm getting 245 V.
I checked at the heat pump and the black 24 vac wire is wire nutted to a bigger white wire just like in the furnace.
1.75 across top
245 across middle
Zero across bottom
Unhooked black 24 vac wire that is going to the white heat pump wire and both heat and fan are still running.
It's going to take me 2 to 3 days to get another sequencer here. May I contact you after I get it installed? And thanks for your help.