Coleman 9420-351 12V Analog RV Wall Thermostat
Coleman 9420-351 12V Analog RV Wall Thermostat — Product description
The Coleman 9420-351 is a simple 12-volt DC wall thermostat for your RV's air conditioner and furnace. Analog mechanical readout, single-stage heat/cool, high and low fan speeds, and an Auto/On fan mode switch. Black case, no programming, no screen to fuss with.
The Coleman 9420-351 is a straightforward 12-volt DC wall thermostat for your RV's heating and cooling system. It's the analog version, so you get a simple mechanical readout instead of a digital screen. Slide the lever, set your temperature, and you're done. No menus, no programming, nothing to fuss with when you're setting up camp.
This is a single-stage control, which means it handles one stage of heating and one stage of cooling. You pick the mode you want and the thermostat holds the cabin at your setting. It's built for the way most owners actually use their rigs. Warm it up on a cold morning, cool it down in the afternoon, and leave it alone the rest of the day.
Fan control is where this unit earns its keep. You get high and low fan speed settings, so you can move a lot of air fast or keep things quiet overnight. There's also an Auto/On fan mode switch. Set it to Auto and the blower only runs when the system is actively heating or cooling. Flip it to On and the fan runs continuously, which is handy when you want steady air circulation through the coach.
The black case keeps it low-key against darker interior walls, and the layout is clean and easy to read at a glance. If your old Coleman-Mach analog thermostat has quit or the lever feels sloppy, this is the direct mechanical replacement that keeps everything working the way you're used to.
A few things to know before you wire it in. This is a 12-volt DC control, so it's meant for RV systems, not household line-voltage setups. And because it's single-stage with a manual mode selection, it won't automatically switch itself between heat and cool. You choose the mode. For a lot of folks, that simplicity is exactly the point. Fewer things to break, and you always know what it's doing.
Wiring is basic low-voltage work. If you're comfortable with a screwdriver and can match up the existing wires, you can swap this in an afternoon. If you're not sure, any RV service tech will have it done in minutes.
Key Features
- 12 Volt DC operation, wired for RV heating and cooling systems
- Single-stage heat/cool control for straightforward one-stage temperature management
- Mechanical readout, no screen or programming to deal with
- High/Low fan speed control to move air fast or keep it quiet overnight
- Auto/On fan mode switch, run the blower only when needed or continuously
- Black case blends into darker interior walls
- Direct mechanical replacement for analog Coleman-Mach wall thermostats
Why Buy from NVN Marine
- Authorized Coleman reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Coleman 9420-351 Single-Stage 12V Heat/Cool RV Wall Thermostat |
|---|---|
| Brand | Coleman |
| Manufacturer Part Number | 9420-351 |
| UPC | 755790005123 |
| Control Type | Single Stage |
| System Control | Heat/Cool |
| Readout | Mechanical |
| Voltage | 12 Volt DC |
| Fan Speed Control | High/Low |
| Fan Mode Control | Auto/On |
| Case Color | Black |
Frequently asked questions
Is the Coleman 9420-351 analog or digital?
It's analog. The 9420-351 uses a mechanical readout instead of a digital screen, so you set your temperature by hand with no menus or programming.
What voltage does this thermostat run on?
It's a 12 Volt DC control, which is what RV heating and cooling systems use. It's not meant for household line-voltage setups.
Can it control the fan speed?
Yes. The 9420-351 has both high and low fan speed settings, so you can move a lot of air quickly or keep things quieter overnight.
What's the difference between the Auto and On fan modes?
On Auto, the blower only runs while the system is actively heating or cooling. On the On setting, the fan runs continuously for steady air circulation through the coach.
Does it control both heating and cooling?
Yes. It's a single-stage heat/cool thermostat, so it handles one stage of heating and one stage of cooling. You select the mode you want.
Will it switch automatically between heat and cool?
No. Because it's a single-stage control with a manual mode selection, you choose heat or cool yourself. It won't change modes on its own.
Will this replace my old Coleman-Mach analog thermostat?
Yes. It's the direct mechanical replacement for an analog Coleman-Mach wall thermostat. Match up the existing low-voltage wires and you're set.
