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Old 04-21-2013, 11:56 AM   #1
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Hunter Thermostat Install

I thought I would share some pictures of my latest modification. I have been meaning to get around to doing this for over a year and finally did it this weekend. I decided to go with a Hunter Model #44157 from Wally World. It was $24.00 bucks. I waved back and forth on getting a programmable one and the non-programmable one for a few bucks less. I am glad I got the programmable one. For example, this weekend it got pretty cold (34F) at night, and I programed it to let the camper fall to 65F while we were sleeping, then at 7:30AM I had it bring the trailer back up to 70F when we got up. It worked perfect! I have a feeling this summer it will not be able to swing the AC up and down like that very quickly, but I am adding a second AC so it should do a fair job I think. I chose the Hunter over the Honeywell because I can program the span setting. Meaning the thermostat is precise to 1 degree. I can alter that to zero or 3 degrees to keep the AC from cycling on and off a bunch plus this thermostat has compressor protection that will not let it cycle on and off within 3 1/2 minutes.

I have a DuoTherm AC and Suburban Furnace.

Here is my old T-Stat wiring:


Here is the Hunter after wiring. Notice the screw holes from the old T-Stat worked for this one! No new holes in the wall!

Blue and Brown wire- G Post (This is the high low on the fan. I never use low so I wired them together for always on high. A toggle switch could be installed if you wanted to be able to switch between Hi/Low)
Green wire - RC
Yellow wire (AC) - Y Post
White wire (Furnace) - W Post
Red Wire 7.5 Volts -Not used-Double electrical taped and taped up and out of the way.


Here it is after install, leveling, and programing. I choose this one also because since it has to run on batteries, I wanted to be able to access them without having to remove it from the wall plate (ease of use for the DW)


Finished! I also chose this one because of the backlight!


All in all, it took me about 15 minutes from start to finish! I really wish I had done this install last year! I hope this helps anyone else wanting to tackle this easy and great modification!
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Old 04-21-2013, 12:34 PM   #2
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Nice mod, 15 minutes and $24 well spent! Gotta agree, if you're doing it the programmable is the only way to go. I did the same in our previous hybrid and TT. I did install the hi/lo switch when I did the hybrid and found we hardly ever used the fan on low. Only a couple times when in AC mode at night. Skipped the switch when I did the mod to our TT. The Hunter Tstat makes controlling the comfort level/temp so much easier than that OEM junk.
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Old 04-21-2013, 03:51 PM   #3
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Thanks! Yeah, I should have done this long ago! I am little concerned now that I have been reading the instructions and it says the system shuts off if the thermostat is under 40F and over 95F. That might be a problem when I get to the trailer in the dead of summer when it is really hot and I want to turn the AC on. The stock Dometic Digital t-stat has the same problem over 100F. I will just have to see how it works out. Still better than the stock analog one!
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Old 04-21-2013, 04:42 PM   #4
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Very nice mod and thanks for the pictures. I will be refering to your thread later this summer if/when I attempt the same change.
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Old 04-21-2013, 08:09 PM   #5
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Hope this isn't a hijack but can u install any digital thermostat? I can't find and of the cheap hunter or Honeywell locally. I did find a Filtrete made by 3M on sale at Home Depot for $15. It looks like it hooks up the same. Just making sure b4 I jump into the install. Tks!!
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Old 04-21-2013, 10:00 PM   #6
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Theromstat

Boatman, I did the digital mod about a year ago myself......... I was in our county " Household Hazardous Waste Collection Center" and someone had turned in a HoneyWell digital thermostat. Brand New in the box!!!
I quick and grabbed it and went here and downloaded the install.
Gotta say, I like it!
I did the Hi/Lo switch on the side, went to Radio Shack and bought one and did the install.
jdadoug
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Old 04-21-2013, 10:46 PM   #7
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As jdadoug did, any thermostat can be installed...as long it can be operated on battery power only.
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Old 04-22-2013, 01:01 PM   #8
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Sweet. Tks guys. I will be adding it this weekend.
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Old 06-24-2013, 09:12 PM   #9
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I did the same today and used the Hunter 44155c. The only issue that I have is when I put it in auto the fan will shutdown but not the compressor. The reason I changed mine was due to the lack sorry job the old one was doing.

I haven't used the FW for awhile so the condensation started building up inside since the old Tstat wasn't working, so I cleaned the AC from one end to the other and I am still having issue and the condensation.

Bout to pull my hair out.
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Old 06-29-2013, 10:38 AM   #10
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Thanks for the pictures. I installed a Hunter thermostat last year and this morning it stopped working, so I really needed the first picture to re-install the original Dometic thermostat.

I'm really disappointed that the Hunter only lasted 1 year though.

I'll try a Honeywell model this time.
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