34 🟡 Repair Required
Rinnai Error Code 34: Combustion Air Thermistor
⚠️ Your Rinnai water heater is experiencing a combustion air thermistor issue, which has caused it to shut down. This is not an immediate safety risk, but it does require professional attention.
How to Fix Rinnai Code 34
- Step 1: Check if the water heater is receiving power. If not, ensure the circuit breaker is turned on.
- Step 2: Inspect the area around the water heater for any signs of damage or obstruction to the combustion air intake.
- Step 3: If the issue persists, contact a licensed HVAC technician to diagnose and repair the problem. Never attempt to open the water heater or tamper with its internal components.
What Does Rinnai Error Code 34 Mean?
The Rinnai 34 error code indicates a problem with the combustion air thermistor, a safety component that monitors the temperature of the incoming air. When this sensor malfunctions, your water heater may shut down to prevent potential safety hazards. This issue is common in Rinnai water heaters and can be caused by a faulty sensor, improper installation, or damage from environmental factors.
Common Causes of Rinnai Code 34
- Faulty combustion air thermistor
- Improper installation of the thermistor
- Damage to the thermistor from environmental factors
Applicable Rinnai Models
Need a Pro to Fix Rinnai Code 34?
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 34
Combustion Air Thermistor OEM: RIN-101464000