--- product_id: 424191088 title: "LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green" brand: "lm yn" price: "VT5641" currency: VUV in_stock: true reviews_count: 5 url: https://www.desertcart.vu/products/424191088-lm-yn-dc-5v-digital-thermostat-module-58-to-257 store_origin: VU region: Vanuatu --- # Accuracy: ±1℉ Power: DC 5V Temp Range: -58℉ to 257℉ LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green **Brand:** lm yn **Price:** VT5641 **Availability:** ✅ In Stock ## Summary > 🌟 Elevate Your Temperature Game! ## Quick Answers - **What is this?** LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green by lm yn - **How much does it cost?** VT5641 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/424191088-lm-yn-dc-5v-digital-thermostat-module-58-to-257) ## Best For - lm yn enthusiasts ## Why This Product - Trusted lm yn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual LED Display:** Stay informed with a vibrant red and green dual LED display. - • **Robust Relay Load:** Handles up to 20A for both DC and AC applications. - • **User-Friendly Design:** Button control and backlight for easy operation, day or night. - • **Versatile Temperature Range:** Perfect for any environment with a wide range from -58℉ to 257℉. - • **Precision at Your Fingertips:** Experience precise temperature control with a sensitivity of 0.1℉. ## Overview The LM YN DC 5V Digital Thermostat Module offers a comprehensive temperature control solution with a wide range of -58℉ to 257℉. Featuring a dual LED display for easy readability, this module ensures precise temperature management with an accuracy of ±1℉. Designed for versatility, it supports a robust relay load of up to 20A, making it suitable for various applications. With a user-friendly button control and backlight, this thermostat module is perfect for both professional and personal use. ## Description LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green ## Features - Upgrade Models. Digital display is modified to Fahrenheit temperature display (old section is Celsius display). Dual LED display, Red+Green, Precise temperature control, high sensitivity, suitable for any occasion required temperature. - Temperature range:-58℉ to + 257℉ ; Resolution: temperature range -3.9℉ ~ 99.9 ℉ is 0.1℉, other temperature ranges 1 ℉. - Temperature measurement accuracy: 1 ℉. Backlash accuracy: 0.1 ℉. Refresh rate: about 0.5S. Input Power: DC 5V. - Measuring input: 1 meter NTC (10K 0.5%) waterproof metal sensors. - Relay Load: DC 14V 20A / AC 125V 20A. ( If the module works for a long time, it is recommended not to exceed 10A.) - LM YN Digital Thermostat Module User Manual https://1drv.ms/b/s!AlzQUCOyZQhKgXZs1xcmusRjKnzR?e=hDDYS4 ## Technical Specifications | Specification | Value | |---------------|-------| | Item Weight | 0.06 Pounds | | Control Type | Button Control | | Backlight | Yes | | Power Source | Battery Powered | | Voltage | 125 Volts | | Shape | Rectangular | | Style | Digital | | Color | Green,red | | Material | Metal | ## Product Details - **Brand:** LM YN - **Model name:** Digital Thermostat Module - **Colour:** Green,red - **Power source:** Battery Powered - **Item weight:** 0.06 Pounds ## Images ![LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 1](https://m.media-amazon.com/images/I/81zmZPKmn9L.jpg) ![LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 2](https://m.media-amazon.com/images/I/81-Qqy8bG3L.jpg) ![LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 3](https://m.media-amazon.com/images/I/41-yIUz6-zL.jpg) ![LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 4](https://m.media-amazon.com/images/I/610JxXs1jRL.jpg) ![LM YN DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green - Image 5](https://m.media-amazon.com/images/I/71xxm8bdnxL.jpg) ## Questions & Answers **Q: just to be clear. This is designed to keep something at a certain temp? So the hot end i see heats up between the specific temps listed?** A: The silver probe tip is the temperature sensor itself. That's what detects the temperature of what ever you are monitoring. When it's above the High temp setting (red) the relay contacts K1 and K0 close so that would activate a fan or what ever you want to monitor. Depending on how you have it setup, if the temp gets below the Low (green) temp, then the relay contacts (K0/K1) open to shut off any cooling you might have running. **Q: Can the relay be driven by 5V DC?** A: As the description says, the board itself is driven by 5v which powers the relay. The ratings it lists is what the relay contact load can carry. **Q: If the board loses power for an extended time, do the settings reset?** A: The settings will be saved when the power off. **Q: Upon power up, is P0 set to cooling or heating?** A: First powered on, the device is cooling mode(can be changed). ## Customer Reviews ### ⭐⭐⭐⭐⭐ It is what is described *by G***E on Reviewed in the United States on 29 June 2018* Pretty cool little thermostat, works great upon installation, and is what it says it is....Simple no frills just a working useable thermostat. I put it in the inverter compartment on my motor coach to control a fan so as to not overheat my inverter while traveling in the 110-120 degree desert Southwest which has happened. There are a number of settings you can control. This opens and closes the negative circuit as described in the pictures section of its product pageThe thermostat arrived on time and in a well packaged parcel in excellent condition.I can't speak to its longevity, or durability as it is recently been put in service. If that becomes an issue I'll update this review accordingly. ### ⭐⭐⭐ It works but a little confused *by M***L on Reviewed in the United States on 10 April 2023* Though the unit works, I’m a little confused. It says the unit works on 5vdc. After hooking it up using a 12volt battery and on a solar charger, when the battery voltage drops below 12volts the unit shuts off. If it operates at 5volts, it should still display the temp readings on the display. I’ve tested several times and sure enough, when battery drops below 12volts the unit shuts off. Hopefully someone can explain this. ### ⭐⭐⭐⭐⭐ Item works great *by J***O on Reviewed in the United States on 3 January 2019* Using it for a Christmas Light display controller box just to ensure the controller board doesn't over heat inside of the enclosure. Worked great. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/424191088-lm-yn-dc-5v-digital-thermostat-module-58-to-257](https://www.desertcart.vu/products/424191088-lm-yn-dc-5v-digital-thermostat-module-58-to-257) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-08*