12 🟡 Repair Required
Rinnai Error Code 12: Flame Failure
⚠️ Your Rinnai water heater has experienced a flame failure, which could lead to water not heating properly. No immediate danger, but call a pro soon.
How to Fix Rinnai Code 12
- Check if the power is on and the circuit breaker hasn't tripped.
- Ensure the gas supply valve is fully open.
- If you're comfortable, reset the water heater by turning off the power, waiting 10 minutes, then turning it back on.
What Does Rinnai Error Code 12 Mean?
The Rinnai 12 error code indicates that your water heater's flame has gone out, preventing it from heating water. This could be due to a few reasons, but don't worry, it's usually an easy fix. The most common cause is a problem with the ignition system, but it could also be a gas supply issue or a faulty temperature sensor.
Common Causes of Rinnai Code 12
- Faulty ignition system (spark module or igniter)
- Low gas supply pressure
- Defective temperature sensor
Applicable Rinnai Models
Need a Pro to Fix Rinnai Code 12?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Rinnai Tankless Water Heater Code 12
Spark Module OEM: RIN-100152000
Igniter OEM: RIN-100152001