ON TOPIC: Fan only furnace operation

I have a thermostat that allows a setting for fan only, which I wish to try to try to push some air around during the warm weather. There is no AC. Furnace is 1960's vintage, and had only two wires to the thermostat. I added a C wire for the smarter thermostat. If I add a FAN wire, will the old furnace have a place to hook it up and respond appropriately?

Reply to
Taxed and Spent
Loading thread data ...

Well, wouldn't you know it. I just replaced a theromstat on my heat pump. The wiring did not exectally match up old to new. I think I have it correct as the cooling part is working. Won't know for about 3 or 4 months if the heat part works.

I could have used the explination of the letters about 8 hours ago..

I did think to take a pix of the old one and labled the wires with the old letters.

I copied that web page and will file it with the other heat pump info.

Reply to
Ralph Mowery

In my first house - a small bungalow - I would block the two main floor air-returns < just lie magazines over them > and open the furnace filter access door - place a spare filter across the door opening - and run the fan - drawing cooler basement air through the spare filter rather than the main floor returns - and circulating it .. not like having air conditioning - but it helped for the muggy days in July-August .. John T.

Reply to
hubops

I did that when I was a kid, but I recall adding a switch to the furnace in the basement. I loved that basement.

Reply to
Taxed and Spent

If this doesn't deliver the environmental improvement you are looking for; a great alternative would be a whole house fan.

Reply to
Stormin' Norman

On Thu 27 Jul 2017 03:38:52p, Taxed and Spent told us...

Kids usually do. I loved our basement too.

Reply to
Wayne Boatwright

Whole house fan might be an alternative, depending on the climate. If the furnace doesn't support a fan wire, I wouldn't waste much time trying to rig up something for the furnace. Just moving air around inside the house isn't going to do much. I have used it to drop the temp in a house without AC temporarily by running the fan on a furnace in the basement with the blower door off and the door to the basement open. It pumps the cool basement air upstairs and there is a nice effect, but the biggest effect doesn't last, once the air has exchanged about one.

Reply to
trader_4

HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.