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Mitsubishi Error Code NOT AVAILABLE: Remote message – function not available (Heat Pump)

Updated · by Aurora Star Tech Inc.

Mitsubishi error code NOT AVAILABLE on a heat pump means: Remote message - function not available. It is also called Mitsubishi diagnostic code NOT AVAILABLE.

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

Homeowner? What Mitsubishi code NOT AVAILABLE means for you

Usually minor Your heat pump is reporting: Remote message - function not available. 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 NOT AVAILABLE mean?

The wired remote displays NOT AVAILABLE when a button is pressed that operates a function this indoor unit does not have. Not a fault. If one remote runs several different indoor units, the message is not shown as long as any one of them supports the function.

Applies to: Mr. Slim PEAD-RP JA(L) ducted indoor units with PAR-21MAA wired remote

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 NOT AVAILABLE

PEAD-RP35JAPEAD-RP35JALPEAD-RP50JAPEAD-RP50JALPEAD-RP60JAPEAD-RP60JALPEAD-RP71JAPEAD-RP71JALPEAD-RP100JAPEAD-RP100JALPEAD-RP125JAPEAD-RP125JALPEAD-RP140JAPEAD-RP140JAL

Other Mitsubishi Heat Pump codes

CodeMeaning
FILTERClean the filter indicator
LED1 (indoor board)Indoor board LED1 - control power
LED2 (indoor board)Indoor board LED2 - remote controller power
LED3 (indoor board)Indoor board LED3 - indoor/outdoor communication
Locked indicatorRemote buttons locked
Louver displaySwing louver action indicator
P1Room (intake) air sensor TH1 open or shorted
P2Liquid pipe sensor TH2 open or shorted
P4Drain float switch disconnected
P5Drain overflow - float switch wet with pump running
P6Coil freeze or overheat protection
P8Pipe temperature out of range (coil not cooling or heating)

All Mitsubishi Heat Pump error codes →

Mitsubishi code NOT AVAILABLE: homeowner questions

What does Mitsubishi code NOT AVAILABLE mean?

Remote message - function not available. The wired remote displays NOT AVAILABLE when a button is pressed that operates a function this indoor unit does not have. Not a fault. If one remote runs several different indoor units, the message is not shown as long as any one of them…

Is it safe to keep using my heat pump with code NOT AVAILABLE?

Usually yes. Code NOT AVAILABLE is normally minor, but if it keeps coming back have it checked.

Can I reset Mitsubishi code NOT AVAILABLE myself?

You can try one reset (power off for 30 seconds, then on). If Mitsubishi code NOT AVAILABLE comes back, the cause is still there and a licensed technician should check it.

Who can fix Mitsubishi code NOT AVAILABLE 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

Source: Mitsubishi PEAD-RP35JA(L) Service Manual, Part Names and Functions, p.4. 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.

Emergency HVAC Service

647-657-2977