Troubleshooting Guidelines - A.O. Smith AOSRE50400 Instruction Manual

trouBleshootinG Guidelines

problem
water leaKs
(see leakage checkpoints in this manual)
no hot water
insufficient hot water
hiGh operation costs
slow hot water recoverY
drip from relief valve
thermostat does not shut off
water odor
water heater sounds
These guidelines should be utilized by a qualified service agent.
possible cause(s)
Improperly sealed, hot or cold supply connection,
relief valve or drain valve.
Leakage from other appliances or water lines.
No power to heater.
High Temperature Limit Switch open.
Non-functioning thermostat.
Non-functioning thermostat.
Improper calibration.
Thermostat set too low.
Sediment or lime in tank.
Heater too small for job.
Wrong piping connections.
Leaking faucets.
Wasted hot water.
Long runs of exposed pipe.
Hot water piping on outside wall.
Improper Calibration.
Thermostat set too high.
Sediment or lime in tank.
Heater too small for job.
Wrong piping connections.
Leaking faucets.
Wasted hot water.
Long runs of exposed piping.
Hot water piping in exposed wall.
Non-functioning element.
Excessive water pressure.
Closed system.
Non-functioning thermostats.
Improper calibration.
Sulfides in the water.
Scale accumulation on elements.
Tighten threaded connections.
Inspect other appliances near water heater.
Turn on electrical switch. Check for blown
fuses or tripped breaker.
Reset. Check for source of trouble and correct.
Replace thermostat.
Replace thermostat.
Replace thermostat.
Set thermostat to desired temperature.
Drain. Determine if water treatment is needed.
Install adequate water heater.
Correct piping.
Repair faucets.
Review and reduce hot water consumption.
Insulate piping.
Insulate piping.
Replace thermostat.
Set thermostat to desired setting.
Drain. Flush-Provide water treatment if needed.
Install adequate heater.
Correct piping.
Repair faucets.
Review and reduce hot water consumption.
Insulate piping.
Insulate piping.
Replace element.
Use Pressure Reducing Valve and Pressure
Relief Valve.
See "Thermal Expansion" in the For Your Infor-
mation section.
Replace thermostats.
Replace thermostats.
See "Operational Conditions" in the For Your
Information section.
Contact dealer to clean or replace elements.
8
corrective action