Quote:
Originally Posted by NeedSpace
How to diagnose what is causing this?
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Hopefully it's just a faulty meter, and the power co. will replace it, and give you a credit. In the meantime, there is one easy check you can do: Pull the main breaker and see if the meter still runs. It should be at a dead stop with the main breaker pulled/off. If it continues to run/creep, then it or any underground wiring on the "house" side of the meter is likely the problem. If you have a secondary breaker box for the meter itself, and can access it, you can switch this off as well (these are often found right below the meter). If the meter stops then, it's likely the wiring and not the meter.
If the meter stops as it should after pulling/switching off the main, you can pull/switch off all of the other breakers and replace/switch them on one-at-a-time to see if you can isolate the culprit. If still no joy, and the power co. says the meter/breakers/wiring are all fine, you may be able to request a "meter test" for a nominal lab fee. If they find it to be reading high/fast, you will typically get reimbursed for the fee and a credit back on your bill for X number of months
(obviously that varies with different utility companies).
If you/they are still stumped after testing the meter/wiring, you might look into doing a thermal imaging survey of the entire house. YMMV. Good luck!