Error code reference
Ingersoll Rand Furnace Error Code E7.1
1st stage gas valve (MVL) is energized when it should be off.
1st stage gas valve (MVL) is energized when it should be off.
First step from the service manual
Remove any heating call, check if 24 VAC nominal voltage is present between red lead at gas valve connection to chassis ground.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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