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Old 10-03-2016, 04:14 PM   #1
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Upgrading analog thermostat to digital one

I have the analog Coleman Mach thermostat in my Roo 233S right now. I would like to upgrade to this one since it's a direct replacement :


RVP 8330 3862 Coleman Mach Black Digital Wall Thermostat | eBay

The questions I have are:

1. Is it plug and play?

2. Do i have to splice wires or do the the wires screw underneath the terminals?

3. Is this mod too complicated for a girl like me to do? Lol

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Old 10-03-2016, 04:31 PM   #2
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I just got the same one to replace my analog tstat. I haven't installed it yet as it just came today.
It comes with pigtails, stripped with wire nuts as the wires are soldered to the circuit board on both tstats. when you take the analog off the wall there should be enough slack that when pull up the wires from the tstat you see they are crimped to the outgoing wires. Simply cut, strip and wire to match the colors.
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Old 10-03-2016, 09:54 PM   #3
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I have the exact same thermostat....very simple to do. In mine it was simply put the wires in the same place as with the old one...all color coded. Nice thing with that thermostat was that it was an exact fit. It's also way more accurate and has a much smaller temperature swing. Very good improvement.
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Old 10-04-2016, 12:52 PM   #4
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Ok thanks.

I'm just a little leary about taking on the project myself.

Could I just use butt connectors to join the wires together?
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Old 10-04-2016, 01:12 PM   #5
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I did the same swap. You have to cut the wire harness into the original stat, strip the wires and attach to the new stat with wire nuts provided. Easy.
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Old 10-04-2016, 01:19 PM   #6
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I did the same swap. Works GREAT by the way.

My original wire connections were all done with non-reusable crimp connectors so I had to cut each one, (near the crimp connector) strip the insulation and reconnect to the new stat with wire nuts. Do them one at a time and you'll have no problems. 10 minute job.
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Old 10-04-2016, 01:20 PM   #7
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When I just did it I used barrel insulated crimp connects 22-18 awg (Home Depot).
The wires on the tstat pigtail are 18 awg which matches up with the Red and Black 2 wire bundle. The other wires on the trailer side seemed to be about 24 awg and did not have that size on stripper. Used wire cutters to strip it as they are solid conductor not a multiple strand conductor like the rest. Since they were solid and undersized for the crimp connector, I bent the stripped end in two and inserted in the crimp connector. After crimping I tugged on the wire to insure it was in tight.

The other thing I did was to insert plastic anchors into the screw holes for mounting.
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Old 10-04-2016, 01:31 PM   #8
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Very easy install. As long as you don't let the wires fall back into the wall. It gets a little complicated if you do. Trust me.
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Old 10-04-2016, 02:12 PM   #9
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I did that swap this summer. It was a 10 minute job. Everything was completely interchangeable down to the screw holes. I have found that in doing mods to my camper, I have yet to find a completely circular hole cut by the builders in my camper. They apparently like to make whatever shape they wish. Lol.
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Old 10-04-2016, 02:34 PM   #10
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If you are worried about doing it, don't. It was easy. Really easy.

Remove all power from the trailer. Then, when swapping the thermostats, only remove one wire at a time from the old thermostat and attach that wire to the same color one on the new thermostat. Then do the next wire.

I did this on two of my previous trailers. You will like the narrower temperature range.
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