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Lennox iComfort Thermostat Setup Instructions

Installation and commissioning guide for Lennox iComfort Wi-Fi, S30, M30, and E30 smart thermostats.

Required Tools

  • Screwdriver
  • Wire stripper
  • Smartphone with iComfort app

Physical Installation

Mount the smart hub and connect wiring.

Steps:

  1. Mount the base/smart hub ensuring the 'UP' arrow points upward
  2. Don't overtighten mounting screws
  3. Wire Connections: Connect thermostat wiring to subbase terminals
  4. Common wire (C) is required for 24VAC operation
  5. Strip 1/4" insulation from wire ends
  6. Insert wires into terminal block and tighten screws securely
  7. Seal wire hole with putty to prevent drafts affecting temperature readings
  8. Attach Display: Align tabs at 45° angle, seat into slots, rotate upward until it snaps into place

Important Warnings:

  • Common wire (C) is required - system will not function without it

Power On & Initial Boot

System initialization and communication check.

Steps:

  1. When powered, the thermostat boots up and shows initial setup screens
  2. Wait up to 1 minute if you see a communication error message during first boot (this is normal)
  3. System will begin scanning for connected equipment

System Setup (Commissioning)

Configure date, time, and dealer information.

Steps:

  1. Date & Time: Use left/right arrows to change month/year
  2. Touch day to select, use up/down arrows for hour/minute
  3. Touch AM/PM field to toggle
  4. Touch 'Next' to continue
  5. Dealer Information: Enter dealer number or phone number (required)
  6. Once entered, system auto-populates remaining fields when connected to Wi-Fi (if dealer has Lennox account)

Equipment Configuration

System automatically detects connected equipment.

Steps:

  1. System auto-detects indoor/outdoor units and accessories
  2. Red text settings must be edited and saved (even if defaults shown)
  3. Navigate: Use arrows → Touch 'Edit' → Make changes → Touch 'Save'
  4. Once all red text is cleared, back button appears
  5. Verify all equipment is correctly identified

Pro Tips:

  • The system communicates with iComfort-compatible Lennox equipment automatically

Wi-Fi Setup - Option A (iOS)

For Apple iPhone and iPad users with S30/E30 models.

Steps:

  1. A pop-up appears with WiFi connection instructions
  2. Use iOS device camera to scan QR/pairing code on thermostat screen
  3. Follow Apple HomeKit accessory configuration prompts
  4. Complete setup within 15 minutes before timeout

Wi-Fi Setup - Option B (Android/Other)

Using the iComfort Mobile Setup app.

Steps:

  1. Smart hub broadcasts WiFi SSID (example: DIRECT-XY12-3456)
  2. Go to mobile device WiFi settings
  3. Connect to smart hub using last 8 digits of SSID as password (e.g., XY123456)
  4. Open iComfort Mobile Setup app
  5. Verify serial number matches your thermostat
  6. Touch 'Remote-In' tab and complete commissioning

Pro Tips:

  • Router must have Bonjour capabilities (Apple Bonjour/Zeroconf networking)
  • Never use guest accounts or open networks
  • Don't install smart hub on/near large metal objects (affects WiFi range)

User Account Registration

Create your homeowner account for remote access.

Steps:

  1. On Thermostat: Navigate to registration screen
  2. Create username and password
  3. Agree to terms and conditions
  4. Click 'Create User'
  5. Post-Registration: Download Lennox iComfort Thermostat App (homeowner app)
  6. Log in with your credentials
  7. System syncs with cloud for remote access

Key Settings to Configure

Essential configurations for optimal performance.

Steps:

  1. Temperature Control: Default range 60-90°F, Control modes: Normal or Comfort, Stage differentials (1st stage default: 1.0°F, adjustable 0.5-8.0°F)
  2. Fan Settings: Options - ON, AUTO, or CIRCULATE (15-50% runtime)
  3. Smart Away (if enabled): Requires iComfort app running on mobile device, Enable location services and 'high accuracy' mode (Android), Set 'away fence' radius: 2-6 miles (default: 2 miles)
  4. Humidity Control (if accessories installed): Humidification/dehumidification modes, Dew point control (requires outdoor temp sensor)

Frequently Asked Questions

Do I need a C wire for Lennox iComfort?

Yes, the Lennox iComfort requires a C (common) wire for 24VAC power. Unlike some other smart thermostats, there is no battery backup or power extender option.

Can I install iComfort myself?

iComfort installation requires professional HVAC knowledge due to the communicating system setup and equipment commissioning. We recommend having a Lennox dealer install and configure the system.

What is Smart Away mode?

Smart Away uses your smartphone's location to detect when you leave home and automatically adjusts temperatures to save energy. When you return, it restores your comfort settings.

Why won't my iComfort connect to WiFi?

Ensure your router supports Bonjour (Zeroconf) networking. Check that you're not using a guest network or open network. Make sure the smart hub isn't near large metal objects that could interfere with WiFi signals.

Need Professional Help?

Our certified technicians can install and configure your Lennox iComfort thermostat professionally.

Call (925) 578-3293 Schedule Online

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