!!
critical Honeywell
Error Code Water Temperature is Not Suitable for Heating/Cooling
A high-severity alarm indicating the water source temperature is not appropriate for the current heating or cooling operation.
? What Causes This
Heat pump water source too cold for heating or too warm for cooling, or water flow issue.
✓ How to Fix It
- Verify water source temperature is within acceptable range.
- Check proof of water flow sensor.
- Verify water pump is functioning.
- Contact service personnel.
Source: page 119 of the official manual
From the manual
