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Old 12-05-2016, 06:22 PM  
nealtw
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I had to jump a wire to the fan switch in the furnace so it would come on with the heat. I guess I could put a manual switch for fan only but I don't think I have ever run just the fan by itself before.
Before anyone had AC that was common here to pull cooler air from the basement.


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Old 12-05-2016, 06:34 PM  
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I had to jump a wire to the fan switch in the furnace so it would come on with the heat. I guess I could put a manual switch for fan only but I don't think I have ever run just the fan by itself before.
Didn't realize you jumper the fan to the heat, I thought you just stole the fan wire and left G open.
Won't your fan come on via control board relays in heat mode?

You'll be blowing cold air while the system is proofing the safetys (~1min), coming up to temp.
If your fan runs after burner shuts down then the control board is running the fan.
This is good to cool down the heat exchanger and get the most out of the warm ducts.



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Old 12-05-2016, 06:35 PM  
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Makes sense I never had a basement before and we just used regular fans because I grew up with wall heaters
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Old 12-10-2016, 10:04 PM  
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Getting off topic here. The OP never mentioned anything about fan switches. It sounds like he wants a master t-stat to control two downstream t-stats for override ability.
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Old 12-11-2016, 10:35 AM  
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Or set a program on a program able tstat, when you bump the temp up or down , it will go back to the program at the next programmed temp change.

And cris , how long of a tstat wire run is it . Somtimes nobody stapled it in the wall and you can tie a new wire to it and pull it through. Or if the existing wire drop straight to the basement you can use a long tiny chain , shove it in the hole in the drywall , jigel it around and it falls through the hole in the floor , tie a new wire to it .
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Old 12-11-2016, 06:13 PM  
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It goes down then over about 20 feet then down again. I might try and pull a new wore but I will wait until I am living in the house and it is summer so I have time.


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