![]() The igniter and its ceramic insulation must be securely tightened to the mounting bracket and in the correct position. My Rinnai Energysaver 556f seems like it no longer works. Verify the correct voltage on the electric board when the unit is in the ignition cycle. If the heater runs normally this will confirm that there is a blockage. If there is no spark, look for the loose, bad, or no connection and the damaged element. It means the unit had a flame and then lost the flame signal to the PCB. At the rear of the heater there are two pipes, one is an insulated metal pipe and the other is plastic pipe.Äisconnect the plastic pipe from the flue box and restart the heater. The LO/Filter light blinking is an indication of Flame Failure. It may be full of cob webs or something else which restricts the air flow to the heater.Ī service person can perform a quick test to prove the above theory. Have the balanced flue checked for blockages, the problem will most likely be in the flue pipe which draws the outside cool air into the heater and not the flue pipe which blows out the hot air. Due to the modern designs of engineers, Rinnai EnergySaver has low sound effects and safety features like sealed combustion and a cool-touch cabinet.
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