Troubleshooting chart – John Wood SpaceSaver (2.5 Gallon) User Manual
Page 14
14
Problem
Possible Cause(s)
Corrective Action
WATER LEAKS
(See Leakage Checkpoints)
Improperly sealed, hot or cold supply
connection, relief valve or drain valve.
Tighten threaded connections.
Leakage from other appliances or water lines. Inspect other appliances near water
heater.
NO HOT WATER
No power to heater.
Turn on electrical switch. Check for blown
fuses or tripped breaker.
High Temperature Limit Switch open.
Reset. Check for source of trouble and
correct.
Non-functioning thermostat.
Replace thermostat.
INSUFFICIENT HOT WATER
Non-functioning thermostat.
Replace thermostat.
Non-functioning element.
Replace element.
Improper calibration.
Replace thermostat.
Thermostat set too low.
Set thermostat to desired temperature.
Sediment or lime in tank.
Drain. Determine if water treatment is
needed.
Heater too small for job.
Install adequate water heater.
Wrong piping connections.
Correct piping.
Leaking faucets.
Repair faucets.
Wasted hot water.
Review and reduce hot water
consumption.
Long runs of exposed pipe.
Insulate piping.
Hot water piping on outside wall.
Insulate piping.
HIGH OPERATION COSTS
Improper Calibration.
Replace thermostat.
Thermostat set too high.
Set thermostat to desired setting.
Sediment or lime in tank.
Drain. Flush-Provide water treatment if
needed.
Heater too small for job.
Install adequate heater.
Wrong piping connections.
Correct piping.
Leaking faucets.
Repair faucets.
Wasted hot water.
Review and reduce hot water
consumption.
Long runs of exposed piping.
Insulate piping.
Hot water piping in exposed wall.
Insulate piping.
SLOW HOT WATER
RECOVERY
Non-functioning element.
Replace element.
DRIP FROM RELIEF VALVE
Excessive water pressure.
Use Pressure Reducing Valve and
Pressure Relief Valve.
Closed system.
See “Closed System/Thermal Expansion”
section.
THERMOSTAT DOES NOT
SHUT OF
Non-functioning thermostats.
Replace thermostats.
Improper calibration.
Replace thermostats.
WATER ODOUR
Sulfides in the water.
See “Operational Conditions” section.
WATER HEATER SOUNDS Scale accumulation on element.
Contact dealer to clean or replace
element.
TROUBLESHOOTING CHART