99 🟡 Repair Required
Rinnai Error Code 99: PCB Replace Required
⚠️ Your Rinnai water heater is displaying a 'PCB Replace Required' error. This indicates a problem with the control board, which is not an immediate safety risk but requires professional attention.
How to Fix Rinnai Code 99
- Step 1: Turn off the power to your water heater at the circuit breaker.
- Step 2: Contact a licensed HVAC technician for repair. Do not attempt to open the water heater or replace the PCB yourself.
- Step 3: If you notice any unusual noises, smells, or water leaks, shut off the water heater immediately and contact a professional.
What Does Rinnai Error Code 99 Mean?
The 'PCB Replace Required' error on your Rinnai water heater means that the main control board (PCB) has detected an issue and needs to be replaced. This could be due to a fault in the board itself or a problem with one of the components it controls. The error is displayed on the digital display, typically as '99'.
Common Causes of Rinnai Code 99
- Faulty PCB (main control board)
- Problem with a component controlled by the PCB, such as the temperature sensor or pressure switch
- Wiring issue connected to the PCB
Applicable Rinnai Models
Need a Pro to Fix Rinnai Code 99?
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 99
PCB (Main Control Board) OEM: RIN-0012000000