HVACopediaGoodman-Amana-Daikin · Air conditioner · Cooling
Communicating low and high stage cooling
What happens, in order
- Thermostat sends Y requesting cooling; the air handler control passes a low stage request over the network to the condenser UC control
- UC control processes compressor and fan delays
- UC control asks the air handler for low stage fan speed
- Condenser starts compressor and condenser fan at low stage
- If low stage cannot meet the load, the board asks for high stage; air handler raises blower speed
- UC control energizes the high stage compressor solenoid and puts the condenser fan on high
- Demand met condenser stops compressor and fan; air handler keeps the blower for any cool off delay
- Control may skip low stage and start on high
- Each side stops if the request for operation is not refreshed within 5 minutes (runaway protection)
Timings and thresholds
| Item | Value |
|---|---|
| Request refresh timeout | 5 min |
Applies to: Goodman ComfortNet ASXC / GSXC / DSXC with AVPTC / MBVC air handlers
Models
More Goodman-Amana-Daikin air conditioner sequences
- Cooling call with blower board delays · Cooling
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Goodman ComfortNet ASXC/DSXC/GSXC service, Sequence of Operation 1.0. 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.