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Replace ignition
Replace ignition
module.
No
Recycle
Are line and neutral
power at lockout signal
Yes
supply wires reversed?
immediately after
restoring power?
Yes
Correct Wiring
START
Place a jumper across
Turn up thermostat.
No
the thermostat terminals
Does the fan turn on
?
Does the fan turn on
Check thermostat wiring
and replace thermostat if
Yes
Unplug burner and check
Is there spark at the igniter? No
electrode and ignition wire.
Are they damaged?
Replace electrode and
ignition wire as needed.
module.
No
Recycle power to the
power.
Is there
blower. Is there power out
No
from exhaust fan output
on ignition module?
Yes
Is there power (230V)
.
No
at the burner?
?
Yes
No
Check relay wiring
(if applicable) and wiring
necessary.
to the burner.
Is the igniter gap
No
3
set at
Yes
No
Carefully reset gap
3
to
mm.
Replace automatic
control unit.
Yes
Is wiring between burner and
fan correct?
No
Correct wiring
.
Fan
bearings may have
failed
.
Replace fan
Is the flue pipe or
Yes
the inlet of the
mm?
burner obstructed?
No
Are the hoses to the pressure
switch secure and leak fr ee
Yes
Remove electrical plug
from pressure switch.
Recycle power to the
No
burner.
Five seconds
after fan
starts,
place
jumper wire between
black and white leads.
Wait 10
seconds.
Is there
a spark at the igniter?
Replace Fan.
Yes
Unplug burner.
Yes
Does the fan
turn freely?
No
No
Is the fan obstructed?
.
Yes
Yes
Remove obstruction.
Repai
r,
replace or
No
tighten hoses
?
as necessary
.
Replace pressure switch
.
Yes
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