Fault Code Lookup

HVAC Sales Master
35
Incorrect Operation Of Device
This code typically points to
  • Device operating in a way that does not match expected command/state

Next checks to confirm
  1. Run thermostat diagnostic mode
  2. S30: Dealer Control Center > Diagnostics > Start
  3. S40: View Service Support Center > Diagnostics > Select All > Start
  4. Check other active alerts
  5. Recycle power

Escalation
Service urgent
Reset behavior
Automatically clears when issue no longer exists.
Urgent
Fix now
Need deeper detail?
Retrieve the subcode for this platform:
  1. On thermostat: Menu > Settings > Advanced Settings > Dealer Control Center > Notifications
  2. Review active alarms on homeowner notification screen or in Dealer Control Center > Notifications
  3. For service-app access, press the smart hub commissioning button once
  4. Connect the mobile device to the smart hub when the LED begins blinking green
  5. Use the app as a service tool after system commissioning is already complete (S30 service session auto-logs out after 30 minutes)
Tool required: iComfort Mobile Setup application for service workflow
Source
Residential Communicating Systems Alert Code Guide, p.10