Goodman Error Code RDS fast flash: R-32 leak alarm (or system verification test) (Air Handler)
Goodman error code RDS fast flash on a air handler means: R-32 leak alarm (or system verification test). It is also called Goodman diagnostic code RDS fast flash.
Homeowner? What Goodman code RDS fast flash means for you
Stop and call Your air handler is reporting: R-32 leak alarm (or system verification test). This code is a safety shutdown. Turn the air handler off and call a licensed technician. Do not keep resetting it. If you smell gas, leave the house and call your gas utility or 911 from outside.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Goodman error code RDS fast flash mean?
Red LED on the A2L board flashing fast. Either the sensor is detecting R-32 right now, or a technician started the 5-minute verification test. During an alarm the board stops the thermostat call, runs the blower and turns off electric heat.
Applies to: R-32 air handlers with refrigerant detection system (A2L PCB + R32 sensor): AMST, AWSF/AWST, ACSF
Common causes of Goodman code RDS fast flash
- Refrigerant leak at the indoor coil or nearby
- Verification test started (button pressed twice within 5 s)
Goodman models that use code RDS fast flash
ACSF****13**AAAMST***U1300AAAWSF****13**AAAWST****13**AA
Other Goodman Air Handler codes
All Goodman Air Handler error codes →
Goodman code RDS fast flash: homeowner questions
What does Goodman code RDS fast flash mean?
R-32 leak alarm (or system verification test). Red LED on the A2L board flashing fast. Either the sensor is detecting R-32 right now, or a technician started the 5-minute verification test. During an alarm the board stops the thermostat call, runs the blower and turns off electric heat.
Is it safe to keep using my air handler with code RDS fast flash?
No. Code RDS fast flash is a safety shutdown, so keep the air handler off until a licensed technician has checked it.
Can I reset Goodman code RDS fast flash myself?
Do not keep resetting it. Repeated resets can hide a safety problem; a licensed technician needs to find the cause.
Who can fix Goodman code RDS fast flash near me?
Aurora Star Tech Inc. repairs Goodman air handlers in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Troubleshooting guides
- Blower not running - R-32 AMST/AWSF EEM air handler Goodman · Air Handler
- No electric heat - R-32 air handler heat kit Goodman · Air Handler
- Outdoor unit not communicating - ComfortBridge AVPTC/MBVC Goodman · Air Handler
Source: Goodman RS6200301 R-32 GLXS/ALXS/GLZS/ALZS service (07-2024), A2L PCB Fault Code and Recommended Action table p.25-26. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.