Coleman 9420-381 Heat/Cool Wall Thermostat – Digital, Black

$61.10

Added to wishlistRemoved from wishlist 0
Add to compare

Price: $61.10
(as of Sep 27, 2025 14:18:14 UTC – Details)


The Coleman -Mach thermostat are simplicity at it’s finest – providing complete control of your air conditioner or heat pump. Easy to install. Low power consumption.
Fan Only/Cool/Heat Modes
Auto Mode
Easy to Install
Easy Wiring
Low power consumption

Customers say

Customers find the thermostat works well and consider it a perfect upgrade for RVs. The installation process receives mixed feedback – while some find it fairly easy to install, others mention a lack of installation instructions. The temperature settings and wire connections also get mixed reviews, with one customer noting the use of 20 AWG solid wire, while another finds the device smaller than expected.

11 reviews for Coleman 9420-381 Heat/Cool Wall Thermostat – Digital, Black

0.0 out of 5
0
0
0
0
0
Write a review
Show all Most Helpful Highest Rating Lowest Rating
  1. 333

    Great Updated RV Thermostat!
    We needed to replace our old Coleman thermostat in our 2015 Jayco Pinnacle fifth wheel after a mishap with forgetting to lock the fridge door and it slamming the thermostat in transit. The old one was manual/ analog style with the screen showing the temp as the only digital part on it. This new one is all digital, with all settings shown on-screen along with the chosen temp, and actual temp, fan/cool/heat selection, all together on the screen at once (Video shows this product first, then the old one for comparison, since we still have an old original one in the other half of our 40′ fifth wheel).We had to call Coleman directly to find the replacement since they no longer make that older thermostat that we broke. They gave us this model number for compatibility with our setup and said good luck, you have to find a seller to buy it from lol. So we bought it on Amazon with excitement to get a digital thermostat in it’s place!It was fairly easy to install, we went to YouTube university and within a couple videos we were ready to go. It’s a smaller unit than the old one, pretty compact and less wires to hardwire than the old unit had, and very simple to use. So simple you can sometimes think you missed a step, since it only takes 2 steps to make any adjustments, until you hear the ac or heater kick on and acknowledge your choice of temp and realize it really is that easy.Works great on simple fan setting, AC, and heat! We have a furnace that can run on gas or electricity and this unit is supposed to work for both but we never use the furnace and only tested on electricity for the furnace, so I’m not sure how it works when on gas but with how good it’s gone with everything else I’m sure it’s also great!We’ve had it about 3 or 4 months and no issues. The price was reasonable, much better than anywhere else we searched, and we received it a little earlier than expected when it was delivered, awesome service! Haven’t needed to speak to the seller because everything was packaged well, came fast and in good shape, and works perfectly, so I can’t speak to customer service. But we’re already looking at buying another to replace our second thermostat in the fifth wheel, we’re full time RVers and this was so easy to install ourselves and works so nicely, looks good and so simple to use, we wanna go ahead and get the upstairs a matching unit!

    Helpful(0) Unhelpful(0)You have already voted this
  2. Adrian Ramirez

    Best RV Thermostat on the Market
    There are surprisingly few good digital thermostats available for RVs, this is about the only one I could find, and it works amazingly well. Very easy to install. Mine came in an opened ESD bag, like it was used, but it looked new, so I guess I’m okay with that. It included a wiring harness that doesn’t fit anything my RV has, so I just discarded that. The skinny and tall shape means your old thermostat will probably leave exposed holes behind after this new one is installed. That’s not great, but I just used some wood filler and it can be stained later to match the wood color of the trailer. A+ thermostat.

    Helpful(0) Unhelpful(0)You have already voted this
  3. Gary C.

    Somewhat Dead on Arrival
    They must have sold me some that was already returned. This thing turns on and then soon as you set the heat temperature it turns off and the Heat obviously turns off. This is horrible product and there’s no returns to yeah they sold me garbage and made sure there was no returns. Do not recommend this product nor do I recommend this seller! Do not buy from these people definitely do not buy this product. It will not work for heat only situations. I don’t know about anything else because I already installed the heat pump for my AC. But this will not run my propane furnace. Garbage let me repeat myself garbage. Save yourself don’t buy this crap and don’t deal with the frustration I’m dealing with. I have two brand new holes in my wall for this garbage.

    Helpful(0) Unhelpful(0)You have already voted this
  4. Sherri Diaz

    Works
    Perfect for what I needed it for. Easy to install and is doing great.

    Helpful(0) Unhelpful(0)You have already voted this
  5. Maurice Martinez

    Installing the wires can be a bit tricky
    Works with the Suburban Furance and the Coleman Mach Air conditioner unit. Both epuipment are 12v powered. This unit is smaller than the original unit, which mine had the analog slider. I had a bit of a issue with installing the wires and the circuit board has these terminal hole that are made to slide the wire in and it suppose to lock in the wire. I had a couple of issue with the wire slipping back out. So you have to really play with wire to make sure it can overcome the force required. The thremostat is working great. Only issue is it smaller so you will see where the drill hole is on the original and having the wire plug into the unit. 4 starts I do like it being digital.

    Helpful(0) Unhelpful(0)You have already voted this
  6. Thomas K

    Works as stated
    Good product. Works well

    Helpful(0) Unhelpful(0)You have already voted this
  7. Santina

    It works!
    Works perfectly. The wire connections are somewhat of a challenge but install took @ 16 minutes and it works great. Same size as the analog, it slides the same mounting bracket. Easy to use and I can actually read what’s going on vs guessing which temp the dial is set to. Odd part is that the package is not sent in a box, the plastic bag is open with a note saying this product is new and if you attempt to return they’ll glad your account. Anyway it works so I’m happy.

    Helpful(0) Unhelpful(0)You have already voted this
  8. Adam

    Nice RV upgrade
    Much easier to set desired temp with the digital display than with the slide style I had before. Works as intended. My thermostat is mounted to an inside wall that shared air space with the “attic” space between roof and ceiling, due to wires being run down inside wall from above. This caused temp readouts to register a few degrees higher than actual room temp. I purchased the add on sensor mentioned in the instructions and ran it to an adjacent wall using cheap bell wire from hardware store. Works great!

    Helpful(0) Unhelpful(0)You have already voted this
  9. Bill

    Size of unit is quite small. I was hoping it would have covered the old holes, but it still works fine.

    Helpful(0) Unhelpful(0)You have already voted this
  10. Darren Hickman

    Defective product! So disappointed. It comes to life but causes the furnace to turn on and off repeatedly. Customer return not accepted, even if defective.

    Helpful(0) Unhelpful(0)You have already voted this
  11. LV

    Reçu article déjà ouvert et utilisé. Un bornier (ground) est brisé… Pour le reste Le thermostat semble bien mais décevant à ce prix d’avoir un article cassé

    Helpful(0) Unhelpful(0)You have already voted this

    Add a review

    Your email address will not be published. Required fields are marked *

    Coleman 9420-381 Heat/Cool Wall Thermostat – Digital, Black
    Coleman 9420-381 Heat/Cool Wall Thermostat – Digital, Black

    $61.10

    Best Deals for all new
    Logo
    Compare items
    • Total (0)
    Compare
    0
    Shopping cart