Goodman Furnace: Counterflow vertical – drain exit side
Counterflow vertical - drain exit side on a Goodman furnace: Counterflow furnace installed vertically. Left side is preferred. Drain out the right side requires moving the trap outside the cabinet.
Applies to: Counterflow vertical install
How to fix counterflow vertical - drain exit side: step by step
- For a left side drain, keep the trap and factory hoses as shipped.
- For a left side drain, install a field rubber coupling with a 1 1/4 in clamp so the trap can be removed for cleaning, or glue a PVC fitting to the trap outlet.
- For a right side drain, remove the hose clamps and hoses, then remove the trap.
- Drain the vent elbow: insert the non-grommet end of hose #10 into the back cabinet drain hole. Put a coupling in the vent-drain elbow drip leg with a silver clamp, then clamp hose #10 to the elbow barb with a silver clamp.
- Drain the collector box: insert the non-grommet end of hose #9 into the front cabinet drain hole and clamp it to the collector drain port with a silver clamp.
- Connect the trap inlets to the hoses with silver clamps.
- Line up the trap mounting holes with the pre-drilled holes and secure with the two screws removed earlier.
- Connect the field drain to the trap outlet per the field drain section.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: Goodman Furnace codes
Source: Goodman GMVC96 service manual, p. 23. 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.