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Rheem · Furnace troubleshooting

No heat - POWER LED off

What is going on

Furnace dead on a heat call and the IFC POWER LED is not lit.

Likely causes

  • Breaker off or tripped
  • Blower door switch open
  • No line power
  • Failed transformer or blown IFC fuse

Check in this order

  1. Warning: Hazardous line voltage - disconnect power before servicing; work must be done by a trained, qualified service technician.
  2. Check the breaker and line power to the furnace.
  3. Check the blower door switch is closed (door installed).
  4. Check the transformer and 24 V at the IFC.
  5. Check the IFC fuse.

Applies to: Rheem (-)GRC/(-)GTC and 90RJ/90TJ 90 Plus condensing gas furnaces

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Source: Rheem (-)GRC/(-)GTC Installation Instructions 92-24161-88-00, Figure 56 IFC Troubleshooting Guide, p.54 (printed); Rheem 90RJ/90TJ Installation Instructions 92-24161-32-08, Figure 53, p.54. 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.