MechDoc Smart WiFi Thermostat (24VAC) • 7-Day Programmable • Works w/ Alexa & Google • C-Wire Required

Upgrade your comfort and control your HVAC from anywhere. This MechDoc smart thermostat is a 7-day programmable model with app control, voice assistant support, and a large backlit display for easy daily use.

Highlights

• Smart control: Control via Smart Life app (also works through Alexa / Google Assistant)
• Voice compatible: Works with Amazon Alexa and Google Assistant devices
• Large display: 6.8 sq. in. backlit screen with simple button controls
• Scheduling: 7-day programming with up to 4 time periods per day
• Connectivity: Wi-Fi (2.4 GHz only) + Bluetooth (dual connection options)
• Protection features: Compressor delay protection (selectable) and temperature calibration

Important Power Requirement (Read Before Buying)

C-wire (24VAC common wire) is REQUIRED. This thermostat does not support battery power. If your system does not have a C-wire, you may need to install one or use a compatible C-wire adapter (sold separately). If the thermostat does not have proper 24VAC power, it will not power on.

System Compatibility

• Works with many single-stage systems (example: 1 Heat / 1 Cool)
• Compatible system types commonly include: gas/oil heat, electric furnaces, cool-only, heat-only, and heat pump without auxiliary heat
• Not for 110V/220V thermostat systems (this is a 24VAC thermostat)

Wiring / Terminals Supported

Supports conventional and heat pump systems using up to 6 wires: RC, RH, C, G, Y, W/O/B.

• RC = cooling power
• RH = heating power
• C = common wire (required)
• G = fan relay
• Y = compressor / cooling
• W = heating
• O/B = heat pump changeover valve

Not Supported (Common Exclusions)

• Multistage systems (examples: Y2, W2, 2H/2C, etc.)
• Heat pump systems with AUX / E (auxiliary or emergency heat)
• 5 GHz Wi-Fi networks (this thermostat supports 2.4 GHz Wi-Fi only)

Specifications

• Brand: MechDoc
• Model No.: QD-HVAC10(W)
• Rated Power: 24V AC, 60Hz
• Power Source Range: 18–30 VAC (NEC Class II), 50/60 Hz (hardwired / common wire)
• Load Rating: 1.0A per terminal; 1.5A maximum (all terminals combined)
• Operating Ambient / Display Range: 23°F to 113°F (-5°C to 45°C)
• Operating Humidity: up to 90% non-condensing
• Temperature Control Range: 45°F to 90°F (7°C to 32°C)
• Display Accuracy: ±1°F (or ±0.5°C)
• Connectivity: Wi-Fi 2.4 GHz + Bluetooth
• Dimensions: approx. 4.65" (W) × 3.47" (H) × 1.2" (D)
• Country of Origin: China

Compliance / IDs

• FCC Authorization ID: 2BBA7HVAC10W

Installation Notes (Quick Tips)

• Before removing your old thermostat, label wires and take a clear photo of the existing wiring.
• If your system uses a single transformer, RC/RH may be jumpered. For dual transformer systems, jumpers may need to be removed.
• If you are unsure about wiring or system type, consider using a qualified HVAC technician.

Note: Compatibility depends on your HVAC system type and wiring. Please verify your wiring terminals and confirm you have a 24VAC C-wire before purchase.