A003 🟡 Repair Required
Rheem Error Code A003: Abnormal Ignition
⚠️ Your Rheem HVAC system has encountered an abnormal ignition issue. It's safe to troubleshoot, but it's recommended to call a professional for repair.
How to Fix Rheem Code A003
- Step 1: Check if the gas valve is open and the gas supply is on.
- Step 2: Inspect the area around the furnace for any gas leaks. If you smell gas, evacuate immediately and call your gas company.
- Step 3: If no gas leak is detected, call a professional HVAC technician for repair.
What Does Rheem Error Code A003 Mean?
The A003 error on your Rheem HVAC system indicates an abnormal ignition issue. This could mean that the system is having trouble igniting the burner or keeping it lit. This is likely due to a problem with the ignition system or the gas supply. Don't worry, it's safe to troubleshoot, but it's recommended to call a professional for repair.
Common Causes of Rheem Code A003
- Faulty ignition control module
- Dirty or faulty igniter
- Gas supply issue (low pressure or leak)
- Clogged or damaged flame sensor
Applicable Rheem Models
Need a Pro to Fix Rheem Code A003?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Rheem Tankless Water Heater Code A003
Ignition Control Module OEM: RHEEM 80-00012710
Igniter OEM: RHEEM 80-00012700
Flame Sensor OEM: RHEEM 80-00012720