EZ 202 Troubleshooting Guide
Follow the step by step instructions given by EZ Tankless and anyone can fix any issue exprienced while operating an EZ 202.
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
B) Bad Batteries
C) Bad Solenoid
A) The overheat limit switch is stuck open and will need replaced.
B) The batteries have enough power to spark the igniter but not enough to hold open the gas solenoid.
C) The solenoid is bad and is failing to stay open.
B) Change batteries with NEW ALKALINE batteries. Please DO NOT USE "HEAVY DUTY" batteries. Alkaline batteries are prefered.
C) Push test Gas Solenoid with limit switch bypassed. Please read the linked article for reference and video.
|EZ 202 will not ignite - There is absolutely no spark
A) Improper Installation of Batteries / Bad Batteries
B) Not Enough Water Flow
C) Bad Micro Switch
D) Bad Battery Box
E) Bad Computer Box
F) Bad Rubber Diaphragm
G) Bad Regulator
A) The batteries are installed improperly or lack the power to spark the igniter.
B) The "Water Flow" lever controls the amount of water flow necessary to ignite heater. If set too high, source water may not have enough flow to spark igniter.
C) The On/Off Micro Switch may be broken and not completing the circuit to the igniter.
D) The circuit elements in the battery box may be broken and not completing the circuit to the igniter.
E) The Computer controlled igniter may be bad.
F) The rubber diaphragm may have torn or developed a hole that is keeping the water from pushing on the ignition valve.
G) The gas regulator in use may be allowing to high a pressure to enter the water heater, keeping the water from pushing on the ignition valve.
A) Double check positioning of batteries and make sure to only use NEW ALKALINE BATTERIES.
B) Move "Water Flow" lever to lowest setting (all the way to the right).
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) Bypass the Battery Box.
E) Order replacement computer from EZ Tankless Parts Page.
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) Buy a new regulator with an outlet pressure set at 11" WC (Water Column)