KeepRite Error Code 9: Comfort Alert 9 – low control voltage (AC)
KeepRite error code 9 on a air conditioner means: Comfort Alert 9 - low control voltage. It is also called KeepRite diagnostic code 9.
Homeowner? What KeepRite code 9 means for you
Check, then call Your air conditioner is reporting: Comfort Alert 9 - low control voltage. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
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.
- Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- Keep about 2 feet around the outdoor unit clear of leaves, grass and debris.
- If you see ice on the pipes or the indoor coil, turn the system off and run only the fan for a few hours, then call a technician.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does KeepRite error code 9 mean?
Yellow ALERT, 9 flashes: control circuit under 17 VAC.
Applies to: KeepRite CXA6/HXA6/TXA6 all sizes; C4A3/H4A3/T4A3 sizes 18 and 36-60 (Comfort Alert module)
Common causes of KeepRite code 9
- Overloaded transformer
- Low line voltage
KeepRite models that use code 9
Other KeepRite AC codes
All KeepRite Air Conditioner error codes →
KeepRite code 9: homeowner questions
What does KeepRite code 9 mean?
Comfort Alert 9 - low control voltage. Yellow ALERT, 9 flashes: control circuit under 17 VAC.
Is it safe to keep using my air conditioner with code 9?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset KeepRite code 9 myself?
You can try one reset (power off for 30 seconds, then on). If KeepRite code 9 comes back, the cause is still there and a licensed technician should check it.
Who can fix KeepRite code 9 near me?
Aurora Star Tech Inc. repairs KeepRite air conditioners in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: AC Running But Not Cooling: What to Check
Troubleshooting guides
- Not cooling All brands · Air Conditioner
- Checking OAT and OCT thermistors - KeepRite C4A3/CXA6 KeepRite · Air Conditioner
Source: KeepRite/ICP C4A3/H4A3/T4A3/CXA6 Installation Instructions 421 01 5103 05, Fig. 15 Comfort Alert Diagnostics, p.13. 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.