HVACopediaICP · Furnace troubleshooting
Reading and retrieving status codes
What is going on
Status LED: heartbeat (bright-dim) = normal; code = short flashes (first digit) then long flashes (second digit). Up to 7 codes are stored and survive power loss.
Check in this order
- Look through the blower door sight glass at the amber LED before removing the door.
- With no thermostat call and blower off-delay finished, leave 115 V on, remove the blower door, turn SW1-1 ON and hold the door switch closed.
- The LED flashes up to 7 stored codes in order; the 8th is a heartbeat.
- Turn SW1-1 OFF; a heartbeat means normal; replace door.
- Codes clear after 72 hours, or manually SW1-1 ON and jumper R, W/W1 and Y/Y2 together until heartbeat, then SW1-1 OFF.
- Note the flowchart version says to disconnect R and reset power before SW1-1 ON.
Applies to: ICP F9MAE / G9MAE modulating variable-speed condensing gas furnaces (060, 080, 100, 120 kBtu/h)
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Source: ICP (F/G)9MAE Service and Technical Support Manual 440 04 4700 00, Retrieving Stored Fault Codes / Figure 16, p.24, p.33. 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.