Goodman Furnace: Rollout switch open
Rollout switch open on a Goodman furnace: The rollout switch has opened and the furnace will not run. A rollout switch trips when flame or hot gas spills out of the burner compartment, so treat it as a real warning and never as a nuisance trip. Switch the power off before you open the furnace, and do not bypass the switch to get heat.
Applies to: 34.5 in chassis gas furnaces
Common causes of rollout switch open
- Gas pressure too high, which pushes the flame out of the burner area
- Burners misaligned
- Restricted heat exchanger or venting, causing combustion gases to spill out
How to fix rollout switch open: step by step
- Turn power off before service.
- Look for scorching, soot or melted wire insulation around the burner compartment.
- Check and correct gas pressure. This is licensed gas technician work.
- Check and correct burner alignment.
- Check and correct restrictions in the heat exchanger or venting.
- Only after the cause is fixed, reset or replace the switch, then watch a full cycle. Check for carbon monoxide at the vent and in the room.
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.