Question about Pentair Minimax NT Heater

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Error Code E04 "Fan Failure" But fan operates! However heater will not light. Is this an erroneous error code? The Power, Thermostat and Pressure LEDs are on. If the fan is operating, why is there an error? Thanks for your help. Gary

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Check that the silicone tube that that goes from air pressure switch to the fan does not have any holes in it. Caused by rats.

Posted on Oct 02, 2009

  • Kevin Reuter
    Kevin Reuter Apr 29, 2017

    Worked perfectly. Something chewed a hole in that tube. Patched it up, works like a champ.

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The fan may be OK however the air flow switch may not be working. Replace air switch. Another issue could be the burner is blocked in some way. If you had any mice or other damage to the heater then make sure you remove the blower assembly and inspect the burner before you replace the air flow switch. Do not attempt to jump the air flow switch, that could prove to be very dangerous if the burner is blocked.

Posted on May 03, 2017

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Note:
The TV must be in “Shut Down” and not manually switched Off, to perform the Error Code Operational
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Press the front panel “DEVICE” and “MENU” buttons at the same time, and hold for 5 seconds to
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• The flashing then pauses for approximately 1/2 second.
• The LED then flashes indicating the value of the LSD (ones digit) of the Error Code.
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