Overview
The Y603H/16 WiFi Thermostat is an electric-heating room controller you can operate two ways: direct buttons on the wall panel, or remotely from your phone over WiFi. Built for electric underfloor heating and carbon film systems, it switches up to 16 A directly, carries a 3 A boiler contact output, and holds a steady setpoint across homes, hotels, hospitals, schools and offices. It sits in our thermostats & controls range.
Pair it with heating mats, graphene heating film or heating cables. Prefer a glass touch face? See the HY312 WiFi touch thermostat; need the larger commercial sibling? Compare the Y819H WiFi thermostat.
Key Features
- Dual control — tactile buttons on the panel and smartphone app over WiFi; no touch screen, ideal for gloved or wet fingers.
- 16 A electric heating / 3 A water heating — direct switch for mats, film and cables; dry contact for boilers and wet manifolds.
- WiFi remote — adjust temperature, set schedules and check status from Android or iOS, anywhere.
- 90–260 V wide supply — fits 110–120 V and 220–240 V markets with one model.
- 3 m NTC floor sensor — floor-limited mode protects wood, laminate and carpet.
- Energy-saving — scheduling and away setback reduce heating bills.
- Flame-retardant PC + ABS — modern, easy-clean fascia for public and private buildings.
- Child lock & freeze protection — safe defaults for hospitality, schools and holiday homes.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | Y603H/16-WIFI |
| Type | WiFi room thermostat for floor heating systems |
| Application | Office, building, home; widely used in hotels, hospitals, schools |
| Power supply | 90–260 V~ 50/60 Hz |
| Current load | 16 A (electric heating) / 3 A (water heating) |
| Sensor | Built-in room sensor + 3 m external NTC floor sensor |
| Control | Direct buttons + remote WiFi (Android / iOS app) |
| Temperature range | 5–35 °C adjustable; floor limit configurable |
| Body material | Anti-flammable PC + ABS, modern design |
| Mounting | Standard 60 mm wall back box |
| Warranty | 2 years; online technical support, free spare parts, return & replacement |
| Certification | CE, RoHS |
Wiring & Installation
Mount on a standard 60 mm back box. Mains L/N terminals power the unit; the load terminals switch the heating circuit. Electric underfloor loads up to 16 A connect directly; boilers or wet manifolds connect to the 3 A contact terminals. Run the 3 m NTC floor sensor beneath the floor finish between two element runs. Pair the thermostat with your phone through the app wizard on the 2.4 GHz WiFi network — the panel keeps working on buttons even if WiFi drops. Final circuit must be RCD-protected and commissioned by a qualified electrician.
Compatible Heating Systems
- Electric heating mats — direct 16 A switching under tile and stone.
- Graphene heating film — carbon film rooms and renovated floors.
- Heating cables — looped wet-room and whole-floor circuits.
- Hotel floor heating mat — multi-room hospitality zoning.
- Gas boilers & wet underfloor — via the 3 A dry-contact output.
WiFi App & Remote Control
Once bound in the app, each Y603H appears in a room list: set temperature, switch modes (heat / anti-freeze / schedule), and build a 7-day programme remotely. Pre-warm the house on the way home, set back an empty hotel block overnight, and group several thermostats into one dashboard for building-level management. Buttons on the panel always work for visitors and staff — remote control adds convenience, it is not a dependency.
Safety & Certifications
Flame-retardant PC+ABS enclosure, 100 % factory testing, CE and RoHS certification under ISO 9001 quality management. Floor-sensor mode enforces a safe floor-temperature ceiling for wood and laminate; the isolated 3 A contact separates boiler wiring; child lock prevents tampering in schools and hotels; freeze protection guards empty buildings through winter.
Factory & Quality
SunAura Thermal has manufactured heating controls and elements in Qingdao since 2008, exporting to more than 50 countries. The Y603H/16 is assembled and burn-in tested on our own SMT lines, and backed by a 2-year warranty with online technical support, free spare parts and return/replacement service. Tender support includes graphic design and 3D model design for hotel, hospital and school projects. The full line is in the thermostats & controls category.
Packaging & Shipping
Units box with the 3 m floor sensor, fixing parts and multilingual quick-start guide; cartons are pallet-optimised for sea freight with express options. CE/RoHS certificates and batch test records ship with the order, and destination-market labels, app-region notes and multilingual manuals are available for distributor programmes.
OEM / ODM
Private label covers fascia silkscreen, custom packaging, multilingual manuals and app-region configuration. ODM work — fascia colours, button layout variants, or bundled mat-plus-controller kits — is handled in-house from prototype to production. Samples are available before a bulk order, with flexible MOQ for first-time partners.
Wholesale Pricing & How to Buy
Pricing is factory-direct and tiered by quantity for distributors, contractors and project buyers; sample units are offered first. Tell us the heating type, voltage, room count and whether rooms need app grouping; we will confirm the configuration and return a same-day quotation. Contact our sales team for factory price, wholesale terms and free-sample arrangements.
FAQ
Does the Y603H work if the WiFi goes down?
Yes. The buttons on the panel always control heating locally; WiFi only adds remote and scheduled convenience. This makes it suitable for public buildings where visitors should not need an app.
Can it control both electric heating and a boiler?
Yes — 16 A direct output switches electric underfloor mats, film and cables, while the 3 A dry contact drives boilers and wet manifolds from the same panel.
Which phones does the app support?
The WiFi app runs on Android and iOS. Pairing follows the standard wizard on a 2.4 GHz network; once bound you can adjust temperature and schedules from anywhere.
Is it suitable for hotel or school rooms?
Yes — this model is widely used in hotels, hospitals, schools and offices. Child/guest lock holds the programmed temperature while the app lets managers pre-warm or set back rooms remotely.
Does it protect wood and laminate floors?
With the supplied 3 m floor sensor in floor-limited mode, the thermostat caps floor temperature at the finish manufacturer’s safe maximum, protecting laminate and engineered wood.
Related Products
More room controllers in the same range:
- Y819H WiFi thermostat — larger commercial sibling, buttons + app
- HY312 WiFi touch thermostat — glass touch + app control
- Knob WiFi thermostat — simple knob + app alternative
Back to the thermostats & controls collection, or request a wholesale quote for the Y603H/16 WiFi thermostat.
Related Products You May Need
Pair this product with compatible SunAura components — one factory, one warranty.
Smart Thermostats
Precise floor and air temperature control with WiFi and Tuya app support — remote scheduling, pre-heating and energy savings.
K1 Thermostat
Reliable wired thermostat — white backlight LCD, ±1 °C accuracy, 3A/16A/25A load options, child lock and weekly timing for film, mat and cable heating.
K1M WiFi Thermostat
WiFi smart thermostat with colour LCD, Tuya app, weekly scheduling, child lock and antifreeze — for film, mat, cable and panel heating.
K2M WiFi Thermostat
WiFi smart floor heating thermostat with weekly programming, app control and 16A/25A electric or 3A boiler/dry-contact versions for underfloor heating.