Mitsubishi Error Code E1: Remote controller memory error (Heat Pump)

Updated October 15, 2026 · by Aurora Star Tech Inc.

Mitsubishi error code E1 on a heat pump means: Remote controller memory error. It is also called Mitsubishi diagnostic code E1.

Low severityHeat PumpMr. Slim PEAD-RP JA(L) ducted indoor unit

Homeowner? What Mitsubishi code E1 means for you

Usually minor Your heat pump is reporting: Remote controller memory error. 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) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Mitsubishi error code E1 mean?

The remote cannot read its own non-volatile memory.

Applies to: PEAD-RP35/50/60/71/100/125/140JA and JA(L) ducted indoor units (220-240 V models)

Common causes of Mitsubishi code E1

Faulty remote controller

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Mitsubishi models that use code E1

PEAD-RP35JA PEAD-RP35JAL PEAD-RP50JA PEAD-RP50JAL PEAD-RP60JA PEAD-RP60JAL PEAD-RP71JA PEAD-RP71JAL PEAD-RP100JA PEAD-RP100JAL PEAD-RP125JA PEAD-RP125JAL PEAD-RP140JA PEAD-RP140JAL

Other Mitsubishi Heat Pump codes

Code	Meaning
Centrally Controlled indicator	Operation prohibited by master controller
E0	Remote controller not receiving from indoor unit
E2	Remote controller clock error
E3	Remote controller cannot transmit
E4	Indoor unit not receiving from remote controller
E5	Indoor unit cannot transmit to remote controller
E6	Indoor/outdoor communication - indoor not receiving
E7	Indoor unit transmit error to outdoor unit
Fb	Indoor control board memory error
FILTER	Clean the filter indicator
LED1 (indoor board)	Indoor board LED1 - control power
LED2 (indoor board)	Indoor board LED2 - remote controller power

All Mitsubishi Heat Pump error codes →

Mitsubishi code E1: homeowner questions

What does Mitsubishi code E1 mean?

Remote controller memory error. The remote cannot read its own non-volatile memory.

Is it safe to keep using my heat pump with code E1?

Usually yes. Code E1 is normally minor, but if it keeps coming back have it checked.

Can I reset Mitsubishi code E1 myself?

You can try one reset (power off for 30 seconds, then on). If Mitsubishi code E1 comes back, the cause is still there and a licensed technician should check it.

Who can fix Mitsubishi code E1 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 Electric PEAD-RP35-140JA(L) Service Manual, 10-3 Self-diagnosis action table, p.34. 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.