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Old 09-10-2015, 04:29 PM   #31
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Originally Posted by gljurczyk View Post
I have been thinking about what you want to do, Probably the easiest way would be to add a jumper from the red wire at the stat and splice the fan wire to in between a SPST switch. What would happen then is that you could call for heat which would energize the white wire to the furnace for heat. Then turn on the switch that would send voltage to the fan wire at the A/C. Then your blower would come on when you call for heat if you wanted to circulate the air through your duct work. So the switch would feed the fan on. That might work. without using any relays. just a SPST switch. I hope I didn't confuse you. I guess I could draw you a little diagram on how to do it. Most people want there furnace fan to run with there space heaters. You are wanting to run your A/C blower when the furnace is on if I understand your question correctly.
If he wanted circulation, wouldn't a small oscillating fan do the trick? I doubt the air blowing out of the AC ducts would be warm enough to do any good. Our furnace does good in circulating the air. And with the fireplace or a space heater, we're plenty warm.
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Old 09-10-2015, 04:56 PM   #32
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If he wanted circulation, wouldn't a small oscillating fan do the trick? I doubt the air blowing out of the AC ducts would be warm enough to do any good. Our furnace does good in circulating the air. And with the fireplace or a space heater, we're plenty warm.
I can't argue your point, but this is what the OP wanted so I only offer to help him do what he wanted. More then likely it will cause more of a draft, but I just answered how it could be done. He might be at 110 degrees at his registers but will only be about 60 out of the A/C duct work.... But I will try to help anyone, never said that it would help what he wants to do..... I remember the 70's crunch, people were putting in wood burning stoves, they wanted a R/A installed above to circulatre the heat in the house. It never worked to what people thought. The faster you move air the cooler it gets.....
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Old 09-10-2015, 05:08 PM   #33
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I can't argue your point, but this is what the OP wanted so I only offer to help him do what he wanted. More then likely it will cause more of a draft, but I just answered how it could be done. He might be at 110 degrees at his registers but will only be about 60 out of the A/C duct work.... But I will try to help anyone, never said that it would help what he wants to do..... I remember the 70's crunch, people were putting in wood burning stoves, they wanted a R/A installed above to circulatre the heat in the house. It never worked to what people thought. The faster you move air the cooler it gets.....
Glenn, I knew what you were saying was trying to help. Crazy thing, when I was installing my thermostat, I had to trial and error which wire controlled what. Actually had the furnace and AC going at the same time! I knew that wouldn't ever work. Probably start raining inside!

I had a free standing wood burning stove in our first house. It would radiate the heat but the back rooms never heated well.
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Old 09-10-2015, 05:38 PM   #34
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Originally Posted by gljurczyk View Post
I can't argue your point, but this is what the OP wanted so I only offer to help him do what he wanted. More then likely it will cause more of a draft, but I just answered how it could be done. He might be at 110 degrees at his registers but will only be about 60 out of the A/C duct work.... But I will try to help anyone, never said that it would help what he wants to do..... I remember the 70's crunch, people were putting in wood burning stoves, they wanted a R/A installed above to circulatre the heat in the house. It never worked to what people thought. The faster you move air the cooler it gets.....
Thanks for taking the time to think of how to accomplish what i asked, i probably won't do it. I had seen someone do the same thing on youtube, but, frankly, I'm not that interested in cobbing things together -- I hoped there was a ready made solution.
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Old 09-10-2015, 05:45 PM   #35
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If he wanted circulation, wouldn't a small oscillating fan do the trick? I doubt the air blowing out of the AC ducts would be warm enough to do any good. Our furnace does good in circulating the air. And with the fireplace or a space heater, we're plenty warm.
I have used a fan, it does the trick, but I really like the noise and "breeze" from the A/C blower. So far we have been doing as you suggested, using a small electric heater and the blower together and it works great. Once it gets a little colder, though, I'm not sure that I can get away without running the furnace, and then I can't run the blower.... hence the reason for my query.

Another couple issue that I'm working through; I can't run the blower on low, unless the thermostat is set to cool. No biggie, I just turn up the stat so the compressor won't engage. And, I'm also having an issue with the huge temperature range that the analog/stock thermostat swings. Plus and minus 5 degrees is what I read, and i believe that is probably accurate in my trailer.

I'm just looking for answers to get things set up the way I would like.... thanks for taking the time to respond!

John
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Old 09-10-2015, 06:28 PM   #36
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By all means change out the analog. I don't know why they put them in RV's anyway. The price difference can't be much during manufacture.

You'll never regret getting a digital thermostat.
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Old 09-15-2015, 04:50 PM   #37
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8330-3862 thermostat arrived in the mail today... direct wire-for-wire swap, 10 minutes start to finish.

Fan operation is as described in the chart (below) on the single-sheet manual that came with it. The A/C fan does not operate in the HEAT mode. I do think if you added an SPDT center-off switch with center red, gray/green on either end (in parallel with the thermostat on those wires) it would do what you wanted (that would also work on the analog thermostat).

I wasn't sure if my A/C fan had two speeds until I paid close attention when testing out the new one... LO is just slightly quieter than HI.
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