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Furnace: Lennox Pulse

Thermostat: Honeywell RTH6500WF

I have the similar setup as the person in the below link

Can I use the T terminal in my furnace as the C for a Wifi Thermostat?

When I connect the unused blue wire to T Terminal on furnace to C Terminal, then R to R with jumper to Rc on stat, Y to Y, G to G, W to W. Flip the breaker. Thermostat is not powered? The thermostat works because I had a backup plan to use a AC adapter and it worked fine.

What troubleshooting can I do with this issue. I have multimeter.

Thanks

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