Rheem Furnace Code D6
Warning
Horsepower conflict on the model data card. The horsepower the blower motor reports does not match the horsepower stored on the model data card, though the data stored in the control itself does match. The furnace should still operate.
Manual wording: “HORSEPOWER CONFLICT ON MODEL DATA CARD ... The horsepower reported by the motor does not match the horsepower stored in memory in the model data of the model data card.”
Documented for: (-)97V, (-)96V communicating furnaces
Likely causes, most common first
- The blower motor has recently been replaced and the wrong horsepower motor was used
- The model data card or furnace control has recently been replaced and the wrong card or replacement control was used
What you can safely check yourself
- Nothing homeowner-serviceable. The furnace should still operate normally with this code showing in standby.
When to call a technician
A technician needs to identify the correct motor and/or model data card for your furnace model and serial number and replace the mismatched part.
A Rheem furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- Installation Instructions for Upflow Condensing Modulating, Communicating Gas Furnaces - (-)97V Series (92-24161-126-04) (Rheem Manufacturing Company, R97V series modulating condensing gas furnace (and R98V); TABLE 18 normal operation codes, TABLE 19 fault codes, pages 94-104) · checked 2026-08-25
- Installation Instructions for 4 Position Condensing Two-Stage, Communicating Gas Furnaces - (-)96V Series (92-24161-124-08) (Rheem Manufacturing Company, R96V series and (-)(-)96MDV two-stage condensing gas furnaces; TABLE 19 normal operation codes, TABLE 20 fault codes, pages 111-120) · checked 2026-08-25