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Error code reference
Lennox Furnace Error Code E370
Interlock switch sensed open for 2 minutes.
SourceLennox EL296DFV(X) - Service Manual: icomfort-Enabled Gas Furnacep. 14
Diagnostic procedure
The full E370 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Terminate all services and wait for interlock switch to close. Alarm clears when 24VAC is continuously sensed on DS terminal for minimum 10 seconds or on power reset.
SourceLennox EL296DFV(X) - Service Manual: icomfort-Enabled Gas Furnacep. 14
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Lennox furnace.
Models covered by the manuals that document this code
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