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Old 09-24-2022, 05:42 PM   #1
Join Date: Aug 2021
Posts: 48
RVP thermostat

2003 American Eagle, 3 zone roof a/c and 3 zone Aquahot heat, RVComfort ZC, Coleman Mach, 8330-3351 thermostat. A/C works great, front and middle zone heat work great and respond to thermostat. Heater in rear bedroom pumps out the heat, does not respond to thermostat at all, except if I have it off and turn on Aquahot then it will not blow hot. If I have that zone on and let it start heating and then switch zone off it will not turn off until the aqua hot is off. Does not respond to deceasing setting at all. I unplugged the fuse in the thermostat once, it seemed to reset, but then when I tied again itís the same issue.
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Old 09-25-2022, 12:08 AM   #2
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Join Date: Aug 2001
Location: North America somewhere
Posts: 27,292
I practice the KISS principle; I'd first begin with the thermostat, remove from wall and clean each contact to insure the low voltage connections are clean and tight, at both ends.
Pay attention to ground connections for both the 12V and 120V systems in addition to the powered connections.
When you are confident all connections are clean and tight, yet the problem still exists, then the next step is spending money.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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Old 09-26-2022, 02:39 PM   #3
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Ray, easier is best, turns out the zones were hooked up correctly for heat, incorrectly for AC, once I got that figured out all is fine!
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