Viessmann Error Code EH03: Indoor fan speed out of range (Mini-Split)
Viessmann error code EH03 on a mini-split means: Indoor fan speed out of range. It is also called Viessmann diagnostic code EH03.
Homeowner? What Viessmann code EH03 means for you
Call a technician Your ductless mini-split is reporting: Indoor fan speed out of range. The ductless mini-split has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
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 Viessmann error code EH03 mean?
Indoor fan stays too slow (about 300 RPM) or too fast (about 1500 RPM) long enough to stop the unit.
Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units
Common causes of Viessmann code EH03
- Wiring
- Fan wheel blocked
- Bad fan motor
A technician checks these and 1 other possible causes on site before replacing any part.
Viessmann models that use code EH03
DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK
Other Viessmann Mini-Split codes
All Viessmann Mini-Split error codes →
Viessmann code EH03: homeowner questions
What does Viessmann code EH03 mean?
Indoor fan speed out of range. Indoor fan stays too slow (about 300 RPM) or too fast (about 1500 RPM) long enough to stop the unit.
Is it safe to keep using my ductless mini-split with code EH03?
It depends on the cause. The ductless mini-split has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Can I reset Viessmann code EH03 myself?
You can try one reset (power off for 30 seconds, then on). If Viessmann code EH03 comes back, the cause is still there and a licensed technician should check it.
Who can fix Viessmann code EH03 near me?
Aurora Star Tech Inc. repairs Viessmann 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 Viessmann · Mini-Split
- Display shows a strange code or does not answer the remote - DLFSHB indoor Viessmann · Mini-Split
- Multi-zone: one room heats, another will not cool - DLC multi-zone Viessmann · Mini-Split
- Read live data with the outdoor check button (SW1) Viessmann · Mini-Split
- Run the automatic wiring / piping correction Viessmann · Mini-Split
Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17, p.28-29. 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.