HVACopediaRheem · Furnace troubleshooting
Install solid metal base pan for upflow side return
What is going on
If you're setting up a Rheem 96V/96MDV upflow with a side air return, the solid metal base pan has to go in. Skip it and combustion products can get into the living space, which is a carbon monoxide risk, so don't leave it out. On a bottom return it's the opposite, you must not install the solid pan.
Likely causes
- Not a fault call. Required part for side return upflow installs.
Check in this order
- Take the blower door off first.
- Insert the tab onto the flange and push the panel into place.
- Install the screw in the tab located in the blower compartment.
- Tape all edges of the bottom to cover gaps.
- After installing the bottom plate, seal all seams tight with metal tape.
- Double check it is a side return install. For bottom return, leave the solid pan out.
Applies to: Upflow furnaces with side air return
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Source: 96V series installation instructions, p. 43. Written in our own words; check the manual for your exact model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.