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RE: Thermostat not getting 12v
Hey guys, So I still haven't figured it out. I tightened some wire nuts and got the 12v supply to give 12v. However whenever I go to test at the wire nut junction on the furnace RED, T-RED, +BLUE and 12v+ wire nut it is reading 1.5v until i remove the 12v+ wire then it reads 13.6v on the 12v+ wire. So there is an immediate voltage drop whenever I join all of the wires together. I tried jumping the 2 blue wires together but the furnace does not kick on. I also tried putting a jumper wire from my fuse box to supply 12v (or more accurately 13.7) to my thermostat. Whenever I did that My ac kicked on when set to cool, but my Furnace would not kick on. So to me that shows that the Thermostat and rooftop AC unit are both functioning. Which leads me to be believe that there is a wiring issue or connection issue or something in the furnace since the 12v is starting there and moving from the furnace to the thermostat and the ac. I am sort of at my wits end.
https://i.imgur.com/6dOh3mQl.jpg
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KotzurJ
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10/20/23 09:20am |
Tech Issues
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RE: Thermostat not getting 12v
I traced the power source for furnace to a wire nut union beneath the a drawer that is orange and white and coming out of the wall. It reads 2.5v, I cannot seem to find a orange and white set of wires on the fuse box anywhere so i am not sure where these wires are coming from.
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KotzurJ
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10/10/23 03:31pm |
Tech Issues
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RE: Thermostat not getting 12v
I Tested all of the Fuses, they all read 13.7v. I will do the test with the wires next.
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KotzurJ
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10/10/23 03:06pm |
Tech Issues
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RE: Thermostat not getting 12v
Tried running the jumper still getting 1.8v from the red wire on furnace and a good ground. All of the fuses I’m seeing are good. I’ll try jumping the two blue wires and see if it starts.
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KotzurJ
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10/10/23 07:59am |
Tech Issues
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RE: Thermostat not getting 12v
For some reason the images are only opening on my posts if you open them in a new tab. Atleast from my end, I'm not sure if they are showing up for you guys.
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KotzurJ
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10/08/23 03:19pm |
Tech Issues
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RE: Thermostat not getting 12v
I pulled the Furnace out and I am only reading 1.8v on the blue wires. I flipped the switch and attempted to start the system again but it did not start up.
https://imgur.com/a/ZMrkahw
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KotzurJ
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10/08/23 03:18pm |
Tech Issues
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RE: Thermostat not getting 12v
I tested the power supply going into the Furnace, which is a white and black wire similar to the wires supplying the light fixtures and outlets with power. The wires were reading 1.8v So I am guessing that the issue is before the furnace. I do not know where the wires come from thought so that is the new issue. Any ideas?
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KotzurJ
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10/08/23 02:47pm |
Tech Issues
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RE: Thermostat not getting 12v
The Furnace is a SF-35f Model number
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KotzurJ
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10/08/23 02:28pm |
Tech Issues
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RE: Thermostat not getting 12v
The Furnace stickers just say Suburban Manufacturing company Dayton, TN 37321. Direct vent system appliance.
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KotzurJ
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10/08/23 01:26pm |
Tech Issues
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RE: Thermostat not getting 12v
https://imgur.com/a/3lWbfCy
Theres the Thermostat and the wires, I copied the old thermostats wiring . I will remove the furnace cover and post a picture whenever it is done. Thanks! I also have a battery hooked up currently and it is not making a difference.
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KotzurJ
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10/08/23 01:14pm |
Tech Issues
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RE: Thermostat not getting 12v
The camper didn’t have any batteries whenever I got it, and I haven’t put any in. The ac and heat were working great for the past couple months. I tried putting a battery from my truck and hooking it up but it didn’t change anything
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KotzurJ
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10/08/23 09:15am |
Tech Issues
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Thermostat not getting 12v
Hey guys, first post just recently started full timing in a 2004 KZ inc. New Vision 34’ 5th wheel. Everything worked great until last week, the a/c started short cycling and the LP leak detector started screaming and showing a fault. I replaced the thermostat which changed nothing big surprise. I can’t seem to figure this out. I test for voltage at the thermostat and I’m getting 1.67v so I’m figuring loose connection somewhere. I bypassed the leak detector thinking that was causing an issue but it didn’t solve anything. Breakers are alll fine, fuses are good, we are connected to shore power. No other power issues only the thermostat. I’m searched but couldn’t find anything already posted. If anyone has any ideas please let me know. I have a Coleman Mach cool/heat slider thermostat, a airxcel rooftop ac, and I don’t know what brand of furnace, it’s right beneath the stove if that helps. Coming into winter just trying to get this furnace burning.
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KotzurJ
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10/08/23 08:38am |
Tech Issues
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