Hi - We've a digital thermostat for our geothermal unit. Yesterday, we decided to kick on central air. The thermostat says it's 28 degrees F, which is about 45 degrees off. Also this thermostat has been in the same location for 10 years. Because it says 28 degrees, the Cool setting doesn't trigger the air. The Auto setting does trigger the heat because it thinks it's only 28 degrees.
Any words of wisdom? Thanks!
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