EZ DELUXE Operation & Installation Manual - page 13
Q5. THE DISPLAY SHOWS AN ‘E4’ ERROR CODE WHEN TRYING TO IGNITE.
A. This is an error in the fan sensor, fan motor, or motherboard. Remove the front cover of the EZ Deluxe, keep-
ing the display wires attached. Locate the fan in the bottom left corner of the unit. Run a hot water tap. Watch
the fan blades and observe how they are spinning. If the fan increases to high speed when the unit senses water
flow, but the unit shows an ‘E4’ error code, the fan sensor is faulty and requires replacement. If the fan spins very
slowly and the unit goes to E4, the motherboard needs replaced. If the fan does not spin at all, the fan motor is
faulty and requires replacement.
Q6. THE DISPLAY SHOWS AN ‘E5’ ERROR CODE WHEN TRYING TO IGNITE.
A. This is an error of the limit switch or limit switch wire. Remove the front cover of the EZ Deluxe, keeping the
display wires attached. Locate the limit switch in the top left corner. Remove the wires from the limit switch.
Complete the circuit between the two wires using a piece of wire, or by sliding the two tabs together (A video of
this test can be found on our web site). Run water through a hot water tap connected to your EZ Tankless Deluxe
unit kit. If the unit fires and runs while the wires are “jumped”, a new limit switch is required. If, after jumping
the limit switch wires, the unit still returns an ‘E5’ error code, the thermal fuse in the wire may have been blown.
1. To Diagnose: Follow the wire back to the motherboard. Remove the wire from the motherboard, and
using a flathead screwdriver, complete the circuit between the two prongs inside of the socket from which the
limit switch wire had been removed. If the unit runs as it should, a new limit switch is required.
Q7. THE DISPLAY SHOWS AN ‘E6’ ERROR CODE WHEN TRYING TO IGNITE.
A.This is an error on the outlet water temperature probe. We recommend trying to clean it before replacing it. It
is located to the left of the fan on the outgoing water line. It will have a set of two white wires coming off of it and
held in by one bolt. Turn the water off to the unit then remove the bolt holding the temperature probe in place.
Once removed, clean the probe with white vinegar and reinstall it. If the unit continues to show an ‘E6’ after
cleaning the probe then it will need to be replaced.
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EZ TANKLESS DELUXE OPERATION + INSTALLATION MANUAL