RV.Net Open Roads Forum: Do It Yourself Modifications and Upgrades (DIY): digital thermostat

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Eric&Lisa

Scappoose, OR

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Joined: 07/11/2006

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Posted: 12/09/19 08:22pm Link  |  Quote  |  Print  |  Notify Moderator

opnspaces wrote:

Hey Dusty, could you expand on your post? What part of the post is because homes use 24v and RV's use 12v? Is it the jumper between RH and RC? I've always thought that was weird that they all use an external jumper and don't just connect them together internally.


Not Dusty, but taking a guess at the thinking.

Home thermostats are powered by a transformer located with the HVAC system. That transformer provides power to operate the thermostat (assuming it is a thermostat that requires power and not an old mechanical one). Thus more than two wires between the furnace and thermostat.

RV thermostats will have an on-board battery (a couple AAs) to provide power. On a furnace only configuration (no AC) the thermostat is a simple switch. Two wires. Connect them together and the furnace turns on. Very easy to wire.

FWIW, taking out the mechanical thermostat and putting in an electronic one was one of the best mods I did on my RV and on my home.

HTH,
-Eric


Eric & Lisa - Oregon
'97 Silverado K2500, New HT383 motor!, Airbags, anti-sway bar
'03 Lance model 1030, generator, solar,

sayoung

Tx

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Joined: 09/17/2012

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Posted: 12/09/19 08:33pm Link  |  Quote  |  Print  |  Notify Moderator

opnspaces wrote:

Hey Dusty, could you expand on your post? What part of the post is because homes use 24v and RV's use 12v? Is it the jumper between RH and RC? I've always thought that was weird that they all use an external jumper and don't just connect them together internally.

The reason some tstats have separate Rc & Rh is some systems use separate transformers for furnace & condenser.

deltabravo

Spokane, WA

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Posted: 01/01/20 07:10am Link  |  Quote  |  Print  |  Notify Moderator

I upgraded mine earlier this year with a Bluetooth T-Stat

There's also a non Non Bluetooth version


2009 Silverado 3500HD Dually, D/A, CCLB 4x4 (bought new 8/30/09)
2009 Arctic Fox 811 (bought new 11/9/09)
2015 Nash 17k (bought pre-owned 5/23/18)
2008 Haulmark 8.5x20 toy box trailer

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