Mitsubishi Error Code LED3 (indoor board): Indoor board LED3 – indoor/outdoor communication (Heat Pump)
Mitsubishi error code LED3 (indoor board) on a heat pump means: Indoor board LED3 - indoor/outdoor communication. It is also called Mitsubishi diagnostic code LED3 (indoor board).
Homeowner? What Mitsubishi code LED3 (indoor board) means for you
Usually minor Your heat pump is reporting: Indoor board LED3 - indoor/outdoor communication. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
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.
- In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
- 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 Mitsubishi error code LED3 (indoor board) mean?
LED3 on the indoor controller board blinks to show indoor-outdoor communication is working. It should always be blinking.
Applies to: Mr. Slim PEAD-RP JA(L) ducted indoor units with PAR-21MAA wired remote
Mitsubishi models that use code LED3 (indoor board)
PEAD-RP35JAPEAD-RP35JALPEAD-RP50JAPEAD-RP50JALPEAD-RP60JAPEAD-RP60JALPEAD-RP71JAPEAD-RP71JALPEAD-RP100JAPEAD-RP100JALPEAD-RP125JAPEAD-RP125JALPEAD-RP140JAPEAD-RP140JAL
Other Mitsubishi Heat Pump codes
All Mitsubishi Heat Pump error codes →
Mitsubishi code LED3 (indoor board): homeowner questions
What does Mitsubishi code LED3 (indoor board) mean?
Indoor board LED3 - indoor/outdoor communication. LED3 on the indoor controller board blinks to show indoor-outdoor communication is working. It should always be blinking.
Is it safe to keep using my heat pump with code LED3 (indoor board)?
Usually yes. Code LED3 (indoor board) is normally minor, but if it keeps coming back have it checked.
Can I reset Mitsubishi code LED3 (indoor board) myself?
You can try one reset (power off for 30 seconds, then on). If Mitsubishi code LED3 (indoor board) comes back, the cause is still there and a licensed technician should check it.
Who can fix Mitsubishi code LED3 (indoor board) near me?
Aurora Star Tech Inc. repairs Mitsubishi heat pumps 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 · Heat Pump Not Heating or Blowing Cold Air
Troubleshooting guides
- Indoor board LED1 and LED2 both off - no power Mitsubishi · Heat Pump
- Indoor board LED2 blinking - remote controller line problem Mitsubishi · Heat Pump
- Indoor fan does not run Mitsubishi · Heat Pump
- PLEASE WAIT stays on, or an error shows about 2 minutes after power-up Mitsubishi · Heat Pump
- Read the error history with the wired remote self-check Mitsubishi · Heat Pump
- Start a test run from the wireless remote Mitsubishi · Heat Pump
Source: Mitsubishi PEAD-RP35JA(L) Service Manual, Troubleshooting 10-2, LED table, pp.28-30. 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.