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3

Depends on location but 50-55 degrees Fahrenheit is fairly standard.


3

The capacitor needs replacement. While it is possible there is a circuitry problem causing the capacitor to overheat (and thus fail like this), it is also possible it was simply time for this electrolytic capacitor to fail while nothing else is wrong. See this photo for a similar failure mode.


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As the other answer suggests, 50-55 is pretty standard for the purpose of preventing water lines from freezing but there are some other things to consider. I'll also mention that you should consider humidity in addition to temperature. Humidity is measured independent from temperature (aside from the relative humidity), but the important factor here is ...


1

Does the ratio of static pressures between two stories differ at different blower speeds? That's a very interesting question, but I believe it's a moot point. Any dramatic difference would mean your system isn't balanced correctly in the first place. (needs zoning, split systems, or an actual balancing) Stack effect will cause plenty of heat to go upstairs, ...


1

Technically I suppose you could remove the insulation around flex. Why would you want to though? I understand that it fits tight through there but in my installation of commercial duct work (on the side) we have just compressed the insulation. It is after all flexible. One thing that insulation around duct work does is prevent condensation on your ducts when ...


1

Tankless units are limited in the amount of hot water they can produce. It is rated at a certain number of gallons per minute. Think of it in terms of continuous versus multiple use. With a tankless unit rated at 7 gallons per minute you could shower with a 3 gallon per minute shower head until you ran out of fuel. If three people were multiple showering at ...


1

You have a bad high limit switch, or the furnace is overheated. The high limit switch is in place to make sure the furnace doesn't heat up to the point that it damages itself, or anything around it. If the furnace gets too hot, the limit switch opens. When the switch opens the burners turn off, but the blower continues to run in an attempt to clear the heat. ...


1

From the Owner's manual. Hardwiring Requirements (24V and 230V Operation) For 24V models: Connect black and white wires to a dedicated 40Va transformer. (Not Provided.) Notice that it says "to a dedicated 40Va transformer". This means that you'll have to install a 40VA transformer to power the device, not use the transformer in the HVAC unit. ...


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I would recommend first contacting a home energy efficiency company first rather than an HVAC company. HVAC guys are usually clueless about systemic problems like these and will usually try to sell you a larger unit without diagnosing the true cause of the issue (which is a pain in the neck and can probably be fixed for much less than the cost of new ...



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