DIY HVAC Tools

Bosch mini split code AP

Wi-Fi pairing (access point) mode.

  • TypeStatus, not a fault
  • SystemDisplay
  • Can I fix it?Usually a homeowner fix
  • Applies toindoor unit display (classic two-character codes)

What AP means on a Bosch

The unit's Wi-Fi module is broadcasting its own network so the app can connect and configure it. It shows AP during setup, and sometimes after a power interruption if the module reboots.

On this platform, AP is a status, not a fault: the unit is telling you what it is doing; nothing is wrong.

What to do

You can almost always clear this yourself with the steps below.

  1. Finish pairing in the manufacturer's app, or wait; the unit exits AP mode on its own after several minutes.
  2. To force it out, turn the unit off and on with the remote.

When to call a technician

This is not a fault. No technician is needed unless it will not clear.

Which Bosch units show AP

This page applies to Bosch Climate 5000 and Climate 5000 Multi units on the indoor unit display (classic two-character codes). Bosch's own documentation lists AP as "Wi-Fi pairing (access point) mode", the same definition used across the Midea platform (classic codes) it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.

Where Bosch shows this code

indoor unit display (classic two-character codes): The code appears on the indoor unit's LED display in place of the set temperature. Some models also blink the indicator lamps in a pattern that matches the code. E codes are faults in the indoor unit or its communication link, F codes are faults on the outdoor side, and P codes are protections: the outdoor unit has stopped itself to prevent damage. EC is the refrigerant leak check.

Other Bosch codes

Same part of the system as AP:

dFDefrost cycle runningCLFilter cleaning reminderFPLow-temperature heating hold (46°F freeze-protection mode)FCForced cooling test modeLLRemote or wired controller lockedcFAnti-cold-air (heating warm-up)CPRemote on/off contact open
E0Indoor unit EEPROM parameter error / Outdoor unit EEPROM parameter error (outdoor display)E1Communication error between indoor and outdoor unitsE2Zero-crossing signal detection error / Communication error between the outdoor unit and the indoor units (outdoor display)E3Indoor fan speed out of control (indoor fan motor fault) / Communication error between outdoor main board and IPM board (outdoor display)E4Indoor room temperature sensor (T1) open or short circuit / Outdoor temperature sensor fault: coil (T3), ambient (T4), discharge (T5) or a zone coil outlet (T2B)E5Evaporator coil temperature sensor (T2) open or short circuit / Over-voltage or under-voltage protection (outdoor display)ECRefrigerant leak detected (low refrigerant charge)F0Overload current protection (compressor over-current)

All Bosch error codes

AP on other brands

The same characters do not always mean the same thing. Check the brand on your unit.

Questions people ask

Is AP on a Bosch mini split an error?

No. AP is a status message: wi-Fi pairing (access point) mode. The unit's Wi-Fi module is broadcasting its own network so the app can connect and configure it.

Do I need a technician for Bosch AP?

You can almost always clear this yourself with the steps below. This is not a fault. No technician is needed unless it will not clear.

Sources

  • Bosch Climate 5000 Gen 3 Multi-Zone Ductless Installation Instructions (06.2022), error code tables
  • Bosch Climate 5000 single-zone installation manual (error code table)
  • Midea residential split service manual

Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.