Rinnai Water Heater Error Code LC: How to Fix It

Error Code

LC

Brand

Rinnai

Product Type

water_heater

Severity

High

DIY Difficulty

Medium

Estimated Fix Time

3-4 hours

Tools You'll Need

• Descaling pump kit
• Garden hose
• Bucket (5+ gallons)
• Adjustable wrenches
• Protective gloves and eyewear

How to Fix Error Code LC

1. Turn off power and gas supply

   Never work on a hot water heater. Gas and electrical components can cause serious injury if not properly shut off.

2. Close water supply valves

3. Drain the water heater

   Water may be hot initially, so wear gloves and direct the hose to a safe drainage area.

4. Prepare descaling solution

   Always wear protective eyewear and gloves when handling descaling chemicals.

5. Connect descaling pump system

6. Circulate descaling solution

7. Flush with clean water

8. Reconnect and test the system

   Check for any leaks at connection points before fully pressurizing the system.

9. Reset the error code

Parts You May Need