What It Means
- Device communication problem - No other devices on BUS (Communication system).
Lennox Ducted Heating
Lennox Ducted Heating Error Code E105
Ducted Heating:
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E105
Equipment is unable to communicate. Indicates numerous message errors. In most cases errors are related to electrical noise. Make sure high voltage power is separated from BUS. Check for miswired and/or loose connections between the stat, indoor unit and outdoor unit. Check for a high voltage source of noise close to the system. Fault clears after communication is restored.
Other manual wording
SLP98UHV, SLP99UHV
Equipment is unable to communicate. Check for mis wire and loose connections and check for a high voltage source of noise close to the system. (welder etc.).
Applicable models & manual sources
- SL280DFNV
Device communication problem - No other devices on BUS (Communication system).
- SL280UHV
Device communication problem - No other devices on BUS (Communication system).
- SL297UHNV
Device communication problem - No other devices on BUS (Communication system).
- SLP98UHV
Device communication problem − No other devices on BUS (Communication system).
- SLP99UHV
Device communication problem - No other devices on BUS (Communication system).
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
