HARDY MANUFACTURING CO., INC (MODEL H3, H5, & H6) PAGE 35
Section VII 7 – 5 Trouble Shooting Guide H3,H5,&H6
COMPLAINT AREA OF TROUBLE POSSIBLE CAUSES CORRECTIVE ACTION
Excessive wood usage
Symptom;
Pop off valve is relieving
Heater water overflowing
1 Pop-off valve
2 Defective Liquid Level
Switch.
3 Solenoid valve stuck
or corroded
4 Domestic hot water
heat exchanger coil
leaking.
1 If Pop – off valve is relieving
for no reason, replace pop – off
valve
2 Check liquid level switch float
for upright position, float
magnets should be on top.
Check switch by moving float
up and down to see if solenoid
clicks and light goes on and
off, if not replace switch
3 If solenoid does click and the
heater still overflows, it could
be stuck in open position, -
remove and clean or replace.
4 Disconnect line to the electric
water solenoid and turn off
valve to system fill to assure no
water enters tank from the fill
system. If heater tank still
overfills then remove heater
hull and lid to check domestic
water coil for leaks, repair or
replace.
Excessive wood
usage
Or
Overheating
(boiling)
Improper Burning
Grates Grates stopped up Clear grate of ash buildup. If
grates are warped, turn over.
Air intake Damper blower clogged Clean damper blower assembly
Air tube inspection lid Air tube clogged Lift inspection lid and cleanout
all obstructions
Smoke Stack Smoke stack stopped up Remove smoke stack, check flue
out of top of heater, clean both
flue pipe and smoke stack
Baffle (Model H4 Only)
Baffle stopped up
Remove baffle through the fire box
door, clean baffle and flue area.
Fire Fire going out
If fire goes completely out remove
one screw in blower lid.
Forced air blower running
but no draft
1 Solenoid not lifting lid
2 Creosote buildup
1 Replace solenoid
2 See excessive wood usage
Fire boxMoisture In
Fire box
1 Initial or yearly start
up
2 Green Wood
1 Fire box walls will sweat and
water will run down sides, this
should clear up in about a
week.
2 Green wood will create
moisture at any time.
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