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Error code reference
Ingersoll Rand Furnace Error Code E7.1
1st stage gas valve (MVL) is energized when it should be off.
SourceIngersoll Rand S9V2 Furnace - Service Facts: Gas-Fired Condensingp. 55, 59, 76
Diagnostic procedure
The full E7.1 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
Remove any heating call, check if 24 VAC nominal voltage is present between red lead at gas valve connection to chassis ground.
SourceIngersoll Rand S9V2 Furnace - Service Facts: Gas-Fired Condensingp. 55, 59, 76
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 Ingersoll Rand furnace.
Models covered by the manuals that document this code
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