Manual

24
Three Times Ignition failure. The module has gone into safety lockout.
Is
LP tank
full and properly
sized and are all gas
supply valves to
heater open?
Fill tank or resize if
necessary. Open all
gas Supply valves
Yes
No
Is proper gas
pressure supplied
to heater?
Yes
Have
the burner
orifice, burner
casting and manifold
been checked for
blockage?
Is
burner manifold
pressure read at
outlet of gas
valve?
Does igniter
glow?
Is flame sensor
clean?
Is igniter
properly
connected?
Are
115 volts
supplied from
ignition control
module to
igniter?
Yes
Yes
Are high limit
switch contacts
closed?
Yes
Yes
Yes
If contacts are open,
reset the switch.
Determine cause of
high limit tripping.
See footnote at the
end of the
troubleshooting
section.
If pressure is not read, check ohm reading between wires of recitifier plug as connected to gas control. Reading should be 3 meg ohm. If reading shows overload or 0 ohms, replace the rectifier plug and recycle the heater. If problem still exists, replace the gas control valve.
Defective igniter. Perform ohm check and replace igniter If necessary.
Clean flame sensor
with emery cloth or
steel wool.
Connect igniter
to igniter power
supply wiring.
Check wiring between control module
and igniter. Repair or replace as
necessary. If wiring is good, replace
ignition control module.
Provide proper
pressure to heater and
check with a gauge.
No
Remove components
and blow out with
compressed air or
clean with a soft
brush.
No
No
No
No
No
No
No
Is wiring between
flame sensor and
ignition control in
good condition?
Yes
Check wiring, repair or
replace as needed.
No
Is
flame sensor
insulator
cracked?
Yes
Replace sensor.
No
Ensure proper
position of flame
sensor. (1/2 to
3/4 of tip in
burner flame)
Yes
Is heater
properly
grounded?
Contact electrician.
system must be
grounded for
proper operation.
No
Yes
Is high limit
receiving 24 volts
from ignition
control?
A. Check for defective
wires, repair or replace.
B. If wires are good and
voltage is not delivered,
replace ignition control.
No
Yes
Yes