Suburban IW60RL recirculation delay or pump noise

Use this when an IW60RL recirculation system cycles, delays hot water, or has a loud recirculation pump after air enters the lines.

Owner-safe checklist

• Confirm whether recirculation is enabled on the On-Demand Control Center.
• Run hot water at multiple faucets for the manual-described air purge if the pump is loud.
• Record whether recirculation is enabled or disabled and whether hot lines cool between uses.
• Call service if pump noise or delayed hot water persists.

Official sources

• Suburban Tankless Water Heaters Operation & Maintenance Guide Models IW60 and IW60RL