Homeowner hit with $7,000 power bill after new thermostat was wired wrong and ran heat and AC nonstop for 5 months

A lot of people open their utility bill and feel irritated, but WMAR-2 News reporter Mallory Sofastaii describes a Baltimore-area case where the number wasn’t annoying—it was shocking.

The homeowner, Donn Deitemyer, told Sofastaii he went from a normal winter routine to a full-on panic when a bill arrived showing $7,000 in charges, the kind of figure that makes you stare at the page like it has to be a printing error.

In Deitemyer’s case, Sofastaii explains, the trouble wasn’t just rising rates or a cold snap; it was a mistake inside the home that quietly ran up costs for months, and it started with something many homeowners install without a second thought: a new thermostat.

A Bill That Stayed Calm… Until It Didn’t

Sofastaii reports that for most of the winter, Deitemyer’s bill looked steady because he was on budget billing, paying around $300 a month, which can feel like a financial seatbelt when the weather turns brutal.

Then spring arrived, and with it came the moment budget billing can deliver like a punch: when the utility recalculates your actual usage and “true-ups” what you owe…

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