This is the 2nd time our York Diamond 80 furnace won't shut off, even when the system is set to off.

A faulty thermostat was replaced 6-8 months ago and all has been fine since then.

How do we turn it off?

I've killed the circuit breakers that are labeled for the heater/AC unit but the unit keeps running.

This is running up our electric bill. PLEASE HELP!

Thank you!

Ric
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