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View Full Version : Thermostat reads lo and furnace won't run

daddy56
Dec 26, 2013, 08:08 AM
New furance and thermostat reads LO and furance won't run.it did when we put it in.could battries be bad. I just turn it on when we work on the house.
ma0641
Dec 26, 2013, 04:53 PM
Batteries are a cheap check.