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The heater is on but the programmable thermostat keeps showing that the temperature in the house is dropping gradually (without assistance). For example, I set and hold the temp to 68. It reaches it and stays there for a few hrs (sometimes 1 or 2 days). Then, the temp begins to drop slowly. The only thing that I've found as a temporary fix is to take the thermostat off the wall for a few seconds, and then reconnect it. This typically works, but only for a short period of time (a day or 2). Note: when I reconnect it, there's typically a mild burning smell coming through the registers (as if it's the first time it's been turned on for the season. Also, I've changed the air filter thinking that it wasn't allowing enough air to pass through, but that didn't help long term.
Any help/suggestions would be appreciated!
Any help/suggestions would be appreciated!