What It Means
- Low GWP Relay Stuck
Lennox Ducted Heating
Lennox Error Code E390
Ducted Heating: Gas furnace (indoor)
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E390
This indicates an issue with the Low GWP relay in the furnace control. This may require the replacement of the indoor unit control board. This fault clears when the relay operates normally.
Other manual wording
EL280UHEK, EL280UHEK(X), EL297UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK,…
Thuis induicates as issue with the low GWP relay in the furnace control. This may require the replacement of the unit control board. This fault clears when the relay operates normally.
Applicable models & manual sources
- EL180UHNE(K)
Low GWP Relay Stuck
- EL195UHNEK
Low GWP Relay Stuck
EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02
- EL196UHEK
Low GWP Relay Stuck
- ML180UHVK
Low GWP Relay Stuck
- ML193DFEK
Low GWP Relay Stuck
- ML196UHEK
Low GWP Relay Stuck
- ML196UHEK
Low GWP Relay Stuck
- EL280UHEK
Low GWP Relay Stuck
EL280UHEK, EL280UHEK(X)
- EL297UHEK
Low GWP Relay Stuck
- ML296UHVK
Low GWP Relay Stuck
- ML297UH045XV36BK
Low GWP Relay Stuck
ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
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