HVACopediaGoodman · Furnace · Startup
Normal power-up sequence
What happens, in order
- 115 VAC power is applied to the furnace.
- The integrated control module runs its internal checks.
- The control monitors the safety circuits continuously.
- The 7-segment LEDs show the idle display while the furnace waits for a thermostat call.
Codes you may see during this
Id L
Applies to: All 34.5in chassis furnaces
Models
34.5in chassis gas furnaces
More Goodman furnace sequences
- Dual fuel heat pump to gas furnace transition · Heating
- Heating mode sequence of operation · Heating
- Cooling airflow ramping profiles A to D · Cooling
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Goodman GMVC96 service and troubleshooting manual, p. 36. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
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.