After seeing numerous "testimonials" to the value of installing a programmable thermostat, we did (replacing our ancient mercury one). One of the attributes is supposed to be that we can save money by programming it to be at a lower temp when we aren't at home. Seems logical. After doing that and using it for several months, I am questioning the value of it. It seems that when it is set to return to a warmer temp, the heater runs and runs. So, for a standard heater w/o central air system, does it make sense to use it in this way? I have not seen ANY reduction in my oil usage/bill. Thoughts?

What is your "normal"temperature, and what is your "setback" temperature? Maybe the difference is too great.

Normal temp is 70 degrees, and the setback is 63 degrees. Is that too much of a variance?

I wouldn't think so. If you said normal was 72 and setback was 50, I would have been worried.

Another factor is going to be how long you set it back for. If it just during the day when you are at work then I would say that the setback is too far, maybe try 67 or so. If you were gone for a few days at a time then the 63 setting would be more feasible.