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As Ecnerwal said, your furnace cannot keep up with heating your home. This could be caused by a number of things. Your furnace itself is inadequate and cannot keep up with the load. The rating in BTUs is not high enough. There are inefficiencies in your home which is causing the furnace to work harder than it was designed to. The furnace requires ...


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If the home is maintaining the temperature set on the thermostat (at least AT the thermostat) then it's probable that you are near, but not quite at, "design load" for the furnace. At design load, the furnace runs 100% of the time to keep up with heat loss in the house and maintain temperature - if it gets colder than that outside (below the "design ...


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If your hot water heating system is making noise it's likely because there's air in the pipes. Why it happens at 5am regardless of what time you set the thermostat is odd but maybe it's related to what time you set your alarm clock? I don't think bleeding the system will necessarily get rid of the noise if the noise is coming from the pipes. In my ...


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There are a couple of ways. Are you comfortable when it's really hot or cold outside? If so, then it's sufficient. Do a Manual J heat load calculation. You can do a crude approximation of this yourself using http://www.loadcalc.net/ Use "rules of thumb." These rules depend heavily on your area and become less accurate the better or worse your house's ...


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If you have a programmable thermostat check every program every day. It is possible a group program was set. I would suspect a thermostat issue 1st. Including a deflective one. If the weather has been below freezing it is possible there is a sensor over ride on a pipe that is suppose to engage only when freezing is imminent.


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If your basement has a honey bucket sump or water sump pump, what you might be hearing is it shutting off. I have both in my basement. The regular water sump (which gets water from the drain tile and from A/C) runs quite regularly, especially during the rainy season. It is rather noticeable when it runs and shuts off ... it's sounds off when shutting off, ...


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In my house, that's the fridge ending a compressor cycle. It has gotten much louder over the years, but since it still seems to run well and efficiently I haven't bothered trying to get it fixed. If really concerned, spend a day or night triangulating on the noise to find its source, and proceed from there.



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