Goodman Furnace: Auxiliary alarm (condensate) switch wiring
Auxiliary alarm (condensate) switch wiring on a Goodman furnace: The control has a 24VAC Aux Alarm input labeled Condensate for a condensate switch. It can also take compatible CO2 sensors or fire alarm contacts. The default AUX switch is normally closed and opens when the evaporator base pan water level is too high.
Applies to: All 34.5in chassis furnaces
How to fix auxiliary alarm (condensate) switch wiring: step by step
- Wire the condensate switch to the Condensate (AUX) input on the control.
- Verify the switch is normally closed when the pan is dry.
If the unit shows an error code, look it up: Goodman Furnace codes
Source: Goodman GMVC96 service and troubleshooting manual, p. 32. 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.