What It Means
- Gas valve mis-wired.
Lennox Ducted Heating
Lennox Error Code E204
Ducted Heating: Gas furnace (indoor)
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E204
Check gas valve operation and wiring. Clears when repaired.
Other manual wording
SLP98UHV, SLP99UHV
Check operation of gas valve.
Applicable models & manual sources
- EL180UHNE(K)
Gas valve mis-wired.
- EL195UHNEK
Gas valve mis-wired.
EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02
- EL196UHEK
Gas valve mis-wired.
- EL280UHE(X)
Gas valve mis-wired.
- EL280UHEK
Gas valve mis-wired.
EL280UHEK, EL280UHEK(X)
- EL296UHE
Gas valve mis-wired.
- EL297UHEK
Gas valve mis-wired.
- ML180UHVK
Gas valve mis-wired.
- ML193DFEK
Gas valve mis-wired.
- ML196UHEK
Gas valve mis-wired.
- ML196UHEK
Gas valve mis-wired.
- ML296UHVK
Gas valve mis-wired.
- ML297UH045XV36BK
Gas valve mis-wired.
ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK
- SL280DFNV
Gas valve mis-wired.
- SL280UHV
Gas valve mis-wired.
- SL297UHNV
Gas valve mis-wired.
- SLP98UHV
Gas valve mis−wired.
- SLP99UHV
Gas valve mis-wired.
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.
