
TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
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17
Fault Finding Chart 1.4
Twin element model
(continued)
1.4
Are the bottom
thermostat ECO
contacts closed?
(TEST 2)
NO
YES
Is the bottom element
installed in the correct
orientation?
NO
YES
Install element in correct
orientation and reset ECO.
Replace bottom thermostat.
Are the bottom
thermostat contacts
closed? (TEST 3)
Is cylinder water temp
12ºC less than the
bottom thermostat
setting?
NO
YES
Slide bottom thermostat
out from bracket and allow
thermostat base to cool
NO
Did the bottom
thermostat contacts
close? (TEST 3)
NO
Does the bottom
element have the
correct resistance?
(TEST 4)
YES
Replace bottom element.
NO
Is the overall
resistance of the
water heater correct?
(TEST 5)
YES
Locate wiring failure and repair.
NO
Water heater electrically ok.
YES
YES