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Can you attach a photo showing me what wire you connected to and provide model on furnace?
OK if you connected the C from thermostat to that C, you sent 120 volts to the thermostat and possibly fried it.
The C,208V and 230v are high voltage connections. You would need to connect to the smaller wire on opposite side of transformer
Notice in picture below.High voltage on one side of transformer.Low voltage on other
Move the C wire from thermostat over to the small black and we will see if thermostat comes on or if it received damage
I totally understand. The problem is that the C you connected to is a line voltage 120 volt wire. You can not connect there. The low voltage circuit comes off the opposite side of transformer.Your C from thermostat should connect o that small black wire , not the C you connected it to.
The small black wire beside the red one on back of transformer. If blower is not coming on you may have burned up the control board that controls the blower.The reason you popped fuse is by having R fro thermostat connected to 24v and C from thermostat connected to 120v, you created a dead short.
If you have a multi meter I can help you troubleshoot.Otherwise you will need to get a meter or call in a technician.
Excellent. First lets do this. Start at transformer where you connected C wire.
Check for 230v between the C and 230V
Then check for 24v on back side between Red and Black smaller wires.
If thermostat is wired, Lets makes ure it is OFF
Excellent. Now have you moved the C wire over to the small black?If not do so now
Thanks much better,Wire is brown instead of black, Connect C from thermostat to that brown
OK, so lets connect C from thermostat to that brown (sorry, it look black in first pic). Then let me know what you have connected at thermostat