Goodman Furnace: Internal gas valve error (valve energized when it should not be)
Internal gas valve error (valve energized when it should not be) on a Goodman furnace: Gas valve energized with no call. Bad one. Valve shouldn't have power unless the control asks. Kill power first.
Applies to: 34.5 in chassis gas furnaces
Common causes of internal gas valve error (valve energized when it should not be)
- Miswired gas valve circuit
- Shorted gas valve wiring putting voltage on the valve
- Gas valve relay on the integrated control board stuck, not following the call
How to fix internal gas valve error (valve energized when it should not be): step by step
- Power off before you touch it.
- Check the wiring in the gas valve circuit, look for pinched or shorted leads.
- Compare to the wiring diagram, find any miswire.
- With the thermostat satisfied, power up and see if the valve still gets voltage.
- Voltage with no call, control relay is the problem. Replace the integrated control board with the correct part.
- If gas flows with no call, shut the gas off and bring in a licensed tech.
If the unit shows an error code, look it up: Goodman Furnace codes
Source: Goodman GMVC96 Service and Troubleshooting, p. 62. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.