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16
Part 8 - Troubleshooting
Problem
No Hot Water
Not Enough Hot Water
Water Too Hot or Not Hot
Enough
T&P Valve Discharges
Water Leaks
Hot Water Odor
Noisy Operation
Table 7 - Troubleshooting - *See Scald / Electric Shock Warnings and Caution Statements, this Table.
The risk of scald injury increases as you increase water
temperature. Use a water tempering or mixing valve and extreme
caution when using hot water to avoid scald injury. Consult codes
for conformance. Failure to follow the instructions in this warning
statement could result in serious personal injury or death from
scalds.
Be sure to disconnect electrical power before performing service.
Failure to do so could result in electrical shock, property damage,
serious personal injury, or death.
whl-647 Rev. 000 Rel. 000 Date 11.1.17
Reason
Manual disconnect switch turned off
1.
Blown fuse or circuit breaker tripped
2.
Shorted or improper wiring
3.
Circuit overloaded
4.
Grounded element or thermostat
Manual Reset High Limit (ECO) open
1.
Thermostat(s) defective or out of calibration
2.
ECO(s) defective or out of calibration
3.
Heat build-up due to loose wires
Improper wiring
Heater undersized
Defective element(s)
Miswired or defective thermostat causing only one
element to work
Thermostat setting too high or low
Thermostat out of calibration
Thermostat access panel(s) and/or insulation not in
place
Thermostat(s) not resting tightly against mounting
plate
Improperly seated valve
Thermal expansion in closed water system
Damaged / defective valve
Loose connection between inlet / outlet piping, relief
valve, and/or hex nut union on tank fittings
Damaged seal ring washer
Gasket around heating element(s)
High sulfate or mineral content in water supply
Bacteria in water supply
Hard water scale built up on element(s)
Turn switch on
1.
Replace fuse or reset breaker
2.
*Replace, repair, or rewire per detail
3.
*Provide adequate circuit to reduce load
4.
*Replace
Refer to Part 6, this manual.
1.
*Replace thermostat(s)
2.
*Lower thermostat setting or replace
3.
*Tighten wire connections
*Check and rewire per Wiring Detail
Reduce rate of heater use
*Check amperage, replace element if low
*Check wiring or replace thermostat
Change setting as required
*Replace thermostat
Inspect and replace as needed
Ensure that retaining spring(s) or mounting screws
hold thermostat(s) tightly to mounting plates
Open and close the handle to try to reseat valve
Install a thermal expansion tank
Replace relief valve
NOTE: DO NOT plug T&P valve under any
circumstances
Tighten fittings
Replace seal rings as required
Inspect and replace gasket if necessary
Drain and flush water heater. Refill.
Check with local water treatment specialist or
utility to identify and address this problem.
*Remove and clean
If draining of the water heater is necessary, open the T&P valve or
a hot water tap to prevent vacuum buildup in the tank and piping.
Remedy
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