90 🟡 Repair Required
Noritz Error Code 90: Combustion Abnormality
⚠️ Your Noritz water heater has detected a combustion issue. It's safe to use, but needs professional attention.
How to Fix Noritz Code 90
- Check your gas supply valve to ensure it's fully open
- Listen for the ignition system to spark when you turn on the heater
- If the problem persists, contact a professional HVAC technician
What Does Noritz Error Code 90 Mean?
Error code 90 on your Noritz water heater indicates a combustion abnormality. This could be due to improper gas supply, a faulty ignition system, or a problem with the burner itself. The unit has safely shut down to prevent further issues. While it's still safe to use, it's important to have a professional diagnose and fix the problem to ensure your water heater is working efficiently and safely.
Common Causes of Noritz Code 90
- Insufficient gas supply
- Faulty ignition system
- Burner problems
Applicable Noritz Models
Need a Pro to Fix Noritz Code 90?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Noritz Tankless Water Heater Code 90
Ignition System OEM: NOR-IGN-01
Burner Assembly OEM: NOR-BURN-01