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EZ 101 Troubleshooting Guide

Follow the step by step instructions given by EZ Tankless and anyone can fix any issue exprienced while operating an EZ 101.

Syptoms and Solutions

Symptom
What It Means Causes Solutions
EZ 101 and EZ 202:  Unit ignites for 3-10 seconds then shuts down


A) Bad Limit Switch

A) The overheat limit switch is stuck open and will need replaced.

A) Bypass the limit switch to test the unit.  Please read the linked article for reference and video. Tankless Water Heater Limit  Switch Test

B) Bad Batteries

B) The batteries have enough power to spark the igniter but not enough to hold open the gas solenoid.

B) Change batteries with NEW ALKALINE batteries.  Please DO NOT USE "HEAVY DUTY" batteries.  Alkaline batteries are prefered.

C) Bad Solenoid

C) The solenoid is bad and is failing to stay open.

C) Push test Gas Solenoid with limit switch bypassed.  Please read the linked article for reference and video.

EZ 101 will not ignite - There is absolutely no spark





A) Improper Installation of Batteries / Bad Batteries

A) The batteries are installed improperly or lack the power to spark the igniter.

A) Double check positioning of batteries and make sure to only use NEW ALKALINE BATTERIES.

B) Not Enough Water Flow

B) The "Water Temp" knob controls the amount of water flow necessary to ignite heater.  If set too low, source water may not have enough flow to spark igniter.

B) Turn "Water Temp" knob to highest setting.

C) Bad Micro Switch

C) The On/Off Micro Switch may be broken and not completing the circuit to the igniter.

C) Push test the micro switch and bypass if necessary.  Please read the linked article for reference and video. Tankless Water Heater Ignition Switch Test

D) Bad Battery Box

D) The circuit elements in the battery box may be broken and not completing the circuit to the igniter.

D) Test continuity between battery box tabs / Bypass the battery box.

E) Bad Computer Box

E) The Computer controlled igniter may be bad.

E)Having completed all previous electronics tests without generating spark, a new computer box will be needed.

F) Bad Rubber Diaphragm

F) The rubber diaphragm may have torn or developed a hole that is keeping the water from pushing on the ignition valve.

F) Remove the rubber diaphragm and check from tears or hole.  Please read the linked article for reference and video. Rubber Diaphragm Removal and Replacement

G) Bad Regulator

G) The gas regulator in use may be allowing to high of a gas pressure to enter the water heater, keeping the water from pushing on the ignition valve.

G) Buy a new regulator with an outlet pressure set at 11" WC (Water Column)