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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 01-09-2019
Dave Stokes Dave Stokes is offline
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Default Roof A/Cs Thermostat Power??

Yesterday I managed to run/replace all the wiring that was damaged in my fire with the exception of the 120vac wires that feed my front two a/c units. I will get the new 12/2 wiring run this morning. After restoring power to the coach and making sure all breakers have been reset, I noticed the wall mounted T-stat was not on. Yes, I did make sure the switch on the bottom was in the "on" position. Hhmmm, now that I think about it, I did not check to make sure the Master Electrical switch was in the up position. I may have just solved my own problem! I will check that this morning when I get to the coach. In the meantime, if you have another area to check I would be happy to hear of it. I want to test my wiring today and need that to work.



For future reference though, Where does the T-stat get it's power??
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  #2  
Old 01-09-2019
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Randy Dupree Randy Dupree is online now
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Hey Dave!
I think the stat gets its power from a fuse in the bedroom,on the curb side,back wall in the upper cabinet.
I don't remember the fuse number,but the wire is 00 i think.
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  #3  
Old 01-09-2019
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Mark and I found that fuse on Barry Grim's coach in the rear AC cover. We removed the inside cover and there it was in a plastic fuse holder.
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Old 01-09-2019
Clembo Clembo is offline
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Which stat do you have??? If it’s a 5 button it gets its power from the com cable.
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  #5  
Old 01-09-2019
mahansm mahansm is online now
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4 button and 10 button also get power from the com cable.
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  #6  
Old 01-09-2019
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Check to ensure you have +12 volts DC to the main HVAC roof unit.
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  #7  
Old 01-09-2019
Dave Stokes Dave Stokes is offline
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Thanks for the suggestions guys. This morning I checked the Master Switch which was ON and then I checked all the load centers again for a tripped fuse. None found. I looked for the fuse in the rear unit and then the middle and first one. No inline fuses found but I did find a loose RJ11/RJ14 connector jack in the middle unit. That loose com cable restored power to the T-stat. With t-stat power restored I was able to verify that my new 120vac wiring was good ans was able to get the 1/2' ply back on the ceiling. one more project compete!! Thanks for the help.
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  #8  
Old 01-10-2019
Clembo Clembo is offline
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I would recommend installing spare power, ground and com wires while you have it at that stage. You never know.
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