Rinnai Code 03 — Bath Fill Timeout

What Causes Rinnai Code 03?

The bath fill function ran longer than the programmed time limit. Not a true fault — the unit timed out waiting for the tub to fill.

How to Fix Rinnai Code 03

Reset the unit and restart. If you need longer bath fill times, the duration can be adjusted in the service menu. Call us if you need help with Rinnai settings.

When to Call a Professional

Call Simple Water Heater & Filtration if:

• The error code returns after resetting
• You are not comfortable working with gas appliances
• The unit is making unusual sounds alongside the error
• This is the second time you have seen this code in the past year

We are factory-trained on Rinnai and provide repair service throughout Los Angeles, the San Fernando Valley, Westside LA, and Ventura County.