Midea Error Code PH91: Evaporator low temperature protection (Heat Pump)
Midea error code PH91 on a heat pump means: Evaporator low temperature protection. It is also called Midea diagnostic code PH91.
Homeowner? What Midea code PH91 means for you
Check, then call Your heat pump is reporting: Evaporator low temperature protection. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
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 Midea error code PH91 mean?
The indoor coil temperature is too low (freeze protection, normally in cooling).
Applies to: DLCURAH18-60 AAK/ABK single-zone heat pump outdoor units (18K-60K, regular and High Heat)
Common causes of Midea code PH91
- Low indoor airflow - dirty filter, blower problem
- Low refrigerant charge
- Low indoor load / low return air temperature
A technician checks these and 1 other possible causes on site before replacing any part.
Midea models that use code PH91
DLCURAH18AAKDLCURAH18ABKDLCURAH24AAKDLCURAH24ABKDLCURAH30AAKDLCURAH30ABKDLCURAH36AAKDLCURAH36ABKDLCURAH48AAKDLCURAH48ABKDLCURAH60AAKDLCURAH60ABK
Other Midea Heat Pump codes
All Midea Heat Pump error codes →
Midea code PH91: homeowner questions
What does Midea code PH91 mean?
Evaporator low temperature protection. The indoor coil temperature is too low (freeze protection, normally in cooling).
Is it safe to keep using my heat pump with code PH91?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset Midea code PH91 myself?
You can try one reset (power off for 30 seconds, then on). If Midea code PH91 comes back, the cause is still there and a licensed technician should check it.
Who can fix Midea code PH91 near me?
Aurora Star Tech Inc. repairs Midea 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
Source: Midea/Carrier DLCURA Installation Instructions (Catalog DLCURA-03SI), Table 11 Outdoor Unit Diagnostic Codes, p.19. 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.