Question about Noritz 7.1 Gpm Propane Lp Gas Tankless Hot Water Heater

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Code 73 on a noritz tankless propane water heater

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73 code is a circuit board error. It typically occurs if you connect or disconnect anything in the heater with power on. Try disconnecting electricity for 20 seconds to reset the unit. If the problem continues, you may need to replace your circuit board.

Posted on Apr 29, 2011

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