The other day we shut our central air unit off to change the filters, when we went to turn it back on absolutely nothing happened. The thermostat would 'click' when we moved it like normal, but nothing would come on. No air, no heat, nothing. Nothing inside or outside is working. It'd been working just fine prior to this all spring and summer. We put a new thermostat on but that did not change anything. We've checked and rechecked the breakers multiple times but that wasn't the issue. I'm not very handy myself but my boyfriend is and he's not been able to figure it out. Last year I had a fan replaced, which then broke the following day. I paid nearly $900 for the visit and they refused to come out after it stopped working so I've not been thrilled about the idea of calling someone out if I can avoid it.

Hey All, I have a 2 floor (finished basement & 1'st floor) single family with forced hot air/central air. The entire house is a single zone. The basement is always much cooler in the summer while the upstairs gets warmer. As a result, when the AC kicks on, the basement ends up freezing while it has trouble keeping the first floor cool. The last two days I have set the fan to manual to circulate the cold air from the basement throughout the house, even while the AC is off. It has kept the house comfortable and the AC has run much less frequently. What I am wondering is, first and foremost, is it safe to continuously run the fan or is there a risk of burning the fan out or starting a fire? Second, is it economically smart to run the fan 24/7 or would it be cheaper to just let the AC kick on more frequently? It would make sense to me that the fan would use less electricity, but I am no expert here! Thanks for any feedback/help! :) -Kevin