WATER HEATER SERIES
OPERATOR’S MANUAL
15
TROUBLESHOOTING
97-6149 • 97-6162 • 97-6133 • Rev. 3/04
PROBLEM
POSSIBLE CAUSE
SOLUTION
LOW WATER
TEMPERATURE
Improper fuel or water in fuel
Drain fuel tank and replace with proper fuel.
Low fuel pressure
Increase fuel pressure.
Weak fuel pump
Check fuel pump temperature. Replace pump
if needed.
Fuel filter partially clogged
Replace as needed.
Soot build up on coils
Clean coils with soot remover.
Lime build up on coils
Clean inside of coils using Shark's coil
cleaner.
Improper burner nozzle
See specifications.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm or
hot
Lower incoming water temperature.
Fuel pump pressure too high
Lower fuel pressure.
Fuel pump defective
Replace fuel pump.
Detergent line sucking air
Tighten all clamps. Check detergent line for
holes.
Defective high limit switch (thermostat)
Replace.
Incorrect fuel nozzle size
See Burner Nozzle section.
Insufficient water supplied
Check GPM to machine.
Restricted water flow
Check nozzle for obstruction, proper size.
