John Wood Envirosense Power Direct Vent (prior to May 2010) - Manual (Page 39)

39
proBleMs
not enouGh hot water
1.) Blower will not run.
a. “ON/OFF” control switch turned off.
Turn switch to the “ON” position.
b. Blower unplugged. Plug blower back into 115 VAC outlet.
c. No power at outlet. Repair service to outlet.
d. Thermostat defective. Replace thermostat.
e. Control harness defective. Replace control harness.
f. High limit control circuit open.
Reduce the water temperature below 140°F.
Turn the power switch to the off position.
Wait 10 seconds. Turn the power switch to
the on position. Reduce the temperature set
point to minimize likelihood of reoccurrence. If
this does not solve the problem, replace the
thermostat.
g. Blower motor defective. Replace blower assembly.
2.) Thermostat problems
a. Thermostat set too low.
Adjust temperature control higher.
b. Thermostat or ECO defective Replace thermostat.
3.) Others
a. Heater undersized..
Reduce hot water use.
b. Low gas pressure Contact dealer.
c. Incoming water is usually cold. Allow more time for heater to reheat.
d. Leaking hot water pipes of fixtures. Have plumber check and repair leaks.
e. Heater not lit or thermostat not on.
Refer to LIGHTING INSTRUCTIONS.
vent pIpe too hot (aBove 170°f [77°c]) Wrong burner orifice. Turn off heater and gas, clean burner head.
Yellow flaMe
Dirt in burner ports. Turn off heater and gas, clean burner head.
Combustion air path restricted.
Check exhaust venting and air openings
in bottom base pan for obstructions or
blockage.
condensatIon Water on the floor under heater. See CONDENSATION section.
water leaKs
Improperly sealed, hot or cold supply
connections, relief valve, drain valve or
thermostat threads.
Check for leaks. See Figure 1.
Leakage from other appliances or water lines. Inspect other appliances near water heater.
Condensation of flue products. Refer to CONDENSATION section.
leaKInG t & p
Thermal expansion in closed water system.
Install thermal expansion tank (Do not plug
T&P valve).
Improperly sealed valve.
Check relief valve for proper operation (Do
not plug T&P valve).
hot water odors
(refer to cathodic protection)
High sulfate or mineral content in water
supply.
Drain and flush heater thoroughly then refill.
Bacteria in water supply. Chlorinate water supply.
hot water too hot Thermostat set too high.
Refer to TEMPERATURE REGULATION
section.
water heater sounds Condensation dripping on burner. Refer to CONDENSATION above.
sIZZlInG - ruMBlInG Sediment at bottom of heater tank.
Clean sediment from tank. Refer to
DRAINING.
sootInG Improper combustion. Refer to Air Requirements.
Burner wIll not staY lIt-Goes out
4-5 seconds
Outlet polarity is reversed. Test polarity and correct.
High ambient room temperature.
Contact a qualified service agency to
determine cause.
Defective gas valve. Replace gas valve.
vent Gas odors
Lack of air supply.
Shut off water heater immediately and contact a
qualified service agency to determine cause.
Improperly installed vent piping.
Downdraft
Poor Combustion
trouBleshootInG GuIdelInes
These guidelines should be utilized by a qualified service agent.