DIY HVAC Tools

Haier mini split error code 25

IPM current too high.

  • TypeProtection
  • SystemCompressor / inverter
  • Can I fix it?Technician job

What 25 means on a Haier

Current through the inverter module exceeded its limit.

On this platform, 25 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.

Common causes

  • A blocked outdoor coil or failed fan.
  • Low supply voltage.
  • A failing compressor.

How to fix it yourself

Do the reset and the visual checks, but the underlying repair needs a technician with a meter and the service manual.

  1. Look at the outdoor unit: clear leaves, cottonwood fluff, snow or ice from the coil and make sure the fan can spin freely and nothing is stacked against the cabinet.
  2. If you own a multimeter and are comfortable using it, measure the supply voltage at the outdoor unit's L1 and L2 terminals with the unit running. A 230 V system should read roughly 208 to 253 VAC.
  3. Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.

Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.

When to call a technician

Technician check of compressor current.

Which Haier units show 25

This page applies to Haier Haier Flexfit multi-zone (2U/3U/4U…MS2HDA) units. Haier's own documentation lists 25 as "IPM current too high", the same definition used across the Haier / GE multi-zone outdoor display 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 Haier shows this code

These numeric codes show on the Service Monitor Board display inside the multi-zone OUTDOOR unit (behind the service panel). The indoor units signal a fault with blinking lamps; the number on the outdoor board is what identifies it. Codes 1 to 27 are outdoor-unit faults and protections, 28 to 41 are temperature sensors (28 to 31 and 40 are zone liquid-pipe sensors, 32 to 36 are zone gas-pipe sensors), and 42 to 45 are pressure switches and limits.

Other Haier codes

Same part of the system as 25:

2IPM (inverter power module) fault5Compressor overload protection8Compressor discharge temperature too high18Compressor out of synchronism23IPM temperature too high24Compressor start failure
1Outdoor PCB EEPROM fault4Communication failure between IPM and outdoor PCB6Unreliable power input (voltage protection)9Outdoor fan motor fault10Defrost (outdoor coil) temperature sensor fault (open or short circuit)11Compressor suction temperature sensor fault (open or short circuit)12Outdoor ambient temperature sensor fault (open or short circuit)13Compressor discharge temperature sensor fault (open or short circuit)

All Haier error codes

25 on other brands

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

Questions people ask

Can I reset a Haier 25 code myself?

Yes. Turn the system off at the breaker for five minutes, then restart it. If 25 comes back, the fault is real and needs the checks above.

Is it safe to keep running a Haier showing 25?

Not repeatedly. A protection code means the unit stopped itself to prevent damage, and resetting it over and over can turn a cheap repair into a compressor failure. Reset once, check the basics, and stop if it returns.

What will a technician check for 25?

Technician check of compressor current. Ask for the measurements, not just a parts quote.

Sources

  • Haier / GE Ductless Multi-Split Heat Pump Service Manual (4.11.22), Error Codes table

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