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Jason MooreJul 28, 2025
Why is my Navien Mate EQM 580 Heater making noise?
- BBrianna SheppardJul 28, 2025
When you initially turn on your Navien Heater, it might make some noise because it operates in high-speed mode to circulate water for about 3 minutes. This is normal and shouldn't continue after the initial start-up. Also, the motor may run to circulate the water in the mat if the heating unit is plugged in but has not been turned on for awhile.