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Rheem · Furnace troubleshooting

Blower codes 66, 61 and 60 - what to look for

R96V/96MDV

What is going on

Quick sorting of the three ECM motor codes on the R96V control.

Likely causes

  • Restricted or confined ductwork, closed registers (66)
  • Loose motor set screw (66)
  • Blocked wheel, locked rotor or overheating motor (61)
  • Minor internal motor fault (60)

Check in this order

  1. 66 (overspeed / power limit) only shows in the first three minutes of blower operation: open registers, remove duct restrictions, and check the motor set screw is tight on the shaft.
  2. 61 (motor cannot run) clear any obstruction from the wheel and find the cause of overheating; if it keeps failing the motor is likely damaged and needs replacing. Four dead-blower events in one heat call put the control in hard lockout.
  3. 60 (motor able to run) low-level fault, operation continues; no long-term damage expected.
  4. Static pressure should never exceed 1.0 in. w.c. on this ECM furnace.

Applies to: (-)96VA040-115 (R96V / U96V) and (-)(-)96MDV040-115 two-stage variable-speed communicating furnaces

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Source: Rheem (-)96V / (-)(-)96MDV Installation Instructions 92-24161-124-08, Diagnosing blower motor issues p.123. 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.