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sorry for the delay...do you still need help?
Short answer is yes.....C or Common is like a neutral bar...you can heve multiple wires on C.
A thermostat, ac, humidifier...anything added that runs on 24v uses C as the common.....much like the negative post on a battery...
So multiple wires are normal on C terminal
you are correct....spare black to C in thermostat...at other en d in furnace spare black to C
Did you have power off to the furnace?....is there a light lit on circuit board in furnace?
should be able to see the light through a small window in bottom door...or if door off make sure bottom door is on securely so that a pop out safety switch is fully depressed down
Did you see the pop out switch that protrudes when bottom panel is off?
Ok......first thing.....is the bottom door put back on the furnace securely and correct?
Correct.....a button pops out cutting power to the unit as a safety device....the bottom door must be back on
I will standby until I know you are all set
correct....you can tape it down for testing..
can you take and post a pic of the circuit board wiring so I can see what wires you used? There may be more wires..
on your end you should see an attach files link..or a paper clip.
are you sure the blue at the furnace.....is the same blue wire as at the thermostat?
There are multiple cables and easy to confuse......we want to make sure it is the same wire end to end and not just another blue..
I think you have the wrong cable.....locate the G terminal on circuit board with green wire....follow that wire....then tell me if you see another blue wire in the cable the green goes to.
see here and tell me if the blue with arrows to it is the exact blue hooked to C
ok I was seeing this pic HERE and it appeared to be coming out of the other cable and one lokked dingy and used while the other appeared more "fresh.
do you see the blade yellow fuse near the G terminal?
Just look at the side of it to see if the thin filament is still intact...the fuse pulls straight out of the board.
Then if it is not blown....
At thermostat move green to C (G will be empty at thermostat)
At furnace move green to C
Then make a short wire and attach one end in G and the other end in Y.
Remove blue wire from thermostat
remove blue wire from furnace circuit board
Then do the green procedure as mentioned.
I wish you the best and hope all works out....
If the green does not work then you will need to call for service....fingers crossed!
When all set just "rate service" to move off the active list.