03 Short cycling

What the control is telling you

Each of the last 4 run cycles lasted under 3 minutes, with no protector trip and both pressure switches closed. While this code is active the minimum compressor run time is raised from 30 seconds to 3 minutes.

Applies to: Communicating 2-stage condensers and heat pumps with the PCBHR104 or PCBHR105 outdoor control (7-segment display): ASXC16/18, GSXC16/18, DSXC16/18, ASZC16/18, GSZC16/18, DSZC16/18

Likely causes

• Thermostat call dropping in and out (loose wire, bad thermostat, poor location)
• Faulty compressor relay on the outdoor control

Test and repair steps

1. Warning: Kill power to the outdoor unit before touching wiring, the compressor terminals or the control.
2. Check the thermostat and its wiring for loose or intermittent connections; repair or replace.
3. Check the compressor relay on the control; replace the control if it misbehaves.
4. Clears after 4 normal cycles in a row, or by power cycling the 24 VAC.

Models that show this code

24 models in Goodman/Amana ComfortNet ASZC/GSZC/DSZC

Other codes on the same units

• 01 Low side fault or low pressure switch trip
• 02 High side fault or high pressure switch trip
• 04 Locked rotor
• 05 Open circuit - compressor off over 4 hours
• 06 Open start circuit
• 07 Open run circuit
• 08 No line voltage
• 09 Low 24 V control voltage