e046
Call a Pro
Navien · Tankless Water Heaters
Limit control abnormal operation.
Quick Answer
Error code E046 on your Navien Tankless Water Heaters means: Limit control abnormal operation.. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Power cycle once to check for transient fault.
2
Do not continue repeated resets.
3
Contact qualified Navien technician.
4
Inspect limit control circuit and wiring harness.
5
Replace defective component per service manual.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Related Error Codes