Carrier Error Code EH0b: Indoor PCB to display board communication error (Mini-Split)
Carrier error code EH0b on a mini-split means: Indoor PCB to display board communication error. It is also called Carrier diagnostic code EH0b.
Homeowner? What Carrier code EH0b means for you
Check, then call Your ductless mini-split is reporting: Indoor PCB to display board communication error. 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 remote: fresh batteries and the right mode (Cool, Heat or Auto).
- Check the breaker and the outdoor disconnect; both should be ON.
- Open the front cover of the indoor unit and rinse the washable filters if they are dusty; let them dry before putting them back.
- Keep the outdoor unit clear of snow, ice and leaves.
- 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 Carrier error code EH0b mean?
The indoor main board gets no reply from the display board (table prints it as EH 0).
Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units
Common causes of Carrier code EH0b
- Loose display cable
- Bad indoor PCB
- Bad display board
Carrier models that use code EH0b
DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK
Other Carrier Mini-Split codes
All Carrier Mini-Split error codes →
Carrier code EH0b: homeowner questions
What does Carrier code EH0b mean?
Indoor PCB to display board communication error. The indoor main board gets no reply from the display board (table prints it as EH 0).
Is it safe to keep using my ductless mini-split with code EH0b?
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 Carrier code EH0b myself?
You can try one reset (power off for 30 seconds, then on). If Carrier code EH0b comes back, the cause is still there and a licensed technician should check it.
Who can fix Carrier code EH0b near me?
Aurora Star Tech Inc. repairs Carrier ductless mini-splits 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 unit leaking water All brands · Mini-Split
- Poor capacity / high head All brands · Mini-Split
- Water leaking All brands · Mini-Split
- Discharge the inverter capacitors before service Carrier · Mini-Split
- Display shows a strange code or does not answer the remote - DLFSHB indoor Carrier · Mini-Split
- Multi-zone: one room heats, another will not cool - DLC multi-zone Carrier · Mini-Split
- Read live data with the outdoor check button (SW1) Carrier · Mini-Split
- Run the automatic wiring / piping correction Carrier · Mini-Split
Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17, p.31. 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.