Question about Bosch 1600H-LP Liquid Propane AquaStar AquaStar Liquid Propane Tankless Water Heater

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Pilot lights (not always) but gas will not flow into burner

Piezo ingnition model. Shut unit off for 5 days, when turned back on burner would not ignite. Pilot lights but not always. Prior to that burner was not staying lit for very long, would have to shut off water and turn it on again. hoping that it is as simple as a thermostat problem. Unit is mounted in a damp location.

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First Clean the ignitor assembly and make sure the flame is reaching the flame sensor strongly.

You may need to replace the flame sensor.

Posted on Dec 06, 2008

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