Rheem Furnace: Codes look upside down – display orientation switch S1-1
Codes look upside down - display orientation switch S1-1 on a Rheem furnace: The control is used in upflow and downflow cabinets, so the display can be flipped. If a code is not on the list, it is probably being read upside down.
Applies to: (-)96VA040-115 (R96V / U96V) and (-)(-)96MDV040-115 two-stage variable-speed communicating furnaces
How to fix codes look upside down - display orientation switch s1-1: step by step
- S1-1 OFF = upflow (as shipped), ON = downflow.
- Set it to match the furnace position before reading fault codes.
If the unit shows an error code, look it up: Rheem Furnace codes
Models
96MDV040B30A96MDV060B30A96MDV070B30A96MDV085C50A96MDV100C50A96MDV115D50AR96VA0401317MSAR96VA0601317MSAR96VA0701317MSAR96VA0851521MSAR96VA1001521MSAR96VA1151524MSA
Source: Rheem (-)96V / (-)(-)96MDV Installation Instructions 92-24161-124-08, 12.A p.90. 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.