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Old 10-17-2008, 07:18 PM   #15
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So back to my original questions. It doesn't seem like there was a clear answer.
Can this thermostat be adjusted? Do I need to change the original thermostat to improve or stop the furnace short cycling?

Do I have this right:

The NT30 heats up the trailer pretty quick. That is part of the reason for the short cycling. The old smaller btu output heated the trailer slower so the heating cycle was longer.

A second reason for the short cycling is the factory presets on the thermostat and no way to adjust them.

A third reason for the short cycling is a trailer cools fairly quickly because of insulation limitations.

So is switching to an adjustable thermostat my best option to improve the short cycling?
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Old 10-18-2008, 12:56 AM   #16
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Trailers lend to be over BTU'd (is that a W word ) from the start. Larger is not better when it comes to heating (or cooling but that's less of an issue with trailers). If you have way more heat output from the furnace than what's needed to maintain the set point the tstat's not going to fix the problem. A programmable tstat lets you digitally select the temperature swing. Typical values are 1-3 degrees. The tstats have a dampener built in (i.e. they don't instantly react to a change in temperature) but still that's not going to really fix the problem. It's like you're trying to saute with a blow torch. The furnace is just dumping way to much heat into the trailer to maintain a comfortable balance.

Best bet, short of replacing the furnace is to find a point in the trailer where the temperature swings are minimized. That's likely to be down near the floor far away from the furnace. This is a band-aid approach. The other option is to just set up a manual control where you turn on the furnace when you feel cold. Feeling cold may be WAY different that what the temperature at any fixed point in a trailer is. Unfortunately this doesn't work at night unless someone volunteers to stay up and keep watch.
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Old 10-18-2008, 08:40 AM   #17
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Lumatic, I also have the NT-30 and the t-stat that came with it crapped out shortly thereafter...don't waste your money on a new one. I went to Home Depot and bought a cheapo wall mounted t-stat and installed it. Yes, they're supposed to be 24v, but they do work. I've had mine installed for two years now with no problems whatsoever. The temp stays nice and warm, and the NT-30 does NOT cycle so much that it drives you nuts. I'll go over to the garage and take a pic of it to show you.

Edit: Okay, here are the pics. It's a Lux T-Stat; couldn't remember the name before. It's a total K.I.S.S. T-Stat. BTW, the thermometer is working correctly....it's 47* @ 9AM!!!!
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Old 10-18-2008, 09:54 AM   #18
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Thanks Stingray.

You also answered my question about if I need a thermostat specifically for 12v

Marshall
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Old 10-18-2008, 11:00 PM   #19
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24 Volts?

Hi, it's been a few years now since I replaced my thermostat with a new digital model. [about $20.00 or less] The 24 volts basically means it works on a low voltage system versus 120 volts or 240 volts ETC. I don't have a closer picture of it, but I bought the simplest digital thermostat that I could find at Home Depot. And I purposely bought one without the 5 or 7 day program since I don't live in my trailer and everywhere you camp your needs might be differrrent. Click to enlarge picture.
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Old 12-30-2008, 06:55 PM   #20
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I got an Atwood thermostat and it solved the short cycling..
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Old 12-30-2008, 07:20 PM   #21
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Quote:
Originally Posted by Lumatic View Post
I got an Atwood thermostat and it solved the short cycling..
Hi Marshall, where did you get it, and how much?
thank you,
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Old 12-30-2008, 09:34 PM   #22
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Atwood thermostat

Quote:
Originally Posted by rogerdodger View Post
Hi Marshall, where did you get it, and how much?
thank you,
I got it from a local RV supply store. It cost less than $20. It's basic but gets the job done.
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Old 12-30-2008, 10:07 PM   #23
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Is it digital?
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Old 12-31-2008, 07:57 AM   #24
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Is it digital?
It has mechanical controls with an anticipator and looks similar to the thermostat in post 17 above
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