Rinnai LC Code — Scale Buildup Maintenance Reminder

What Causes Rinnai LC Code?

The most common Rinnai code in Los Angeles. LC stands for Lime and scale Code. It is a maintenance reminder — not a fault — indicating the heat exchanger needs descaling due to mineral deposits from hard water.

How to Fix Rinnai LC Code

Do not just reset the LC code without descaling. The scale is still there and will cause more serious codes (14, 16, 61) if ignored. Schedule a descaling service with us — we perform Rinnai descaling throughout the San Fernando Valley and greater LA.

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.