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TROUBLESHOOTING
Troubleshooting
24v
Troubleshooting Chart: 24 Volt
Problem Possible Causes Action
Damper won’t open. No power or insufficient
power at damper.
No signal to damper and the
switch or remote is in the on
position.
Obstruction preventing
damper blade from rotating.
Wiring harness.
Defective damper controller.
Check the voltage between the Black and Brown wire. This should be
the same voltage as the output of the transformer. If this voltage is
zero or below 20 volts AC check the connections and the power to the
transformer.
Check the voltage between the Orange and Black wire after the switch.
This voltage should be the same as the output of the transformer. If this
voltage is zero check the voltage before the switch and make sure you
are switching at least 20 volts AC.
Check for protruding screws or binding in pipe/blade assembly and
correct.
If all the voltages at the bottom were checked and were correct, check
the voltages again at the controller at the top. If there is a difference
between any of them there is a short in the wiring harness.
If Ignition Control Module starts to send a signal to the Spark Electrode
before the damper is open there is a short in the wiring harness.
If all above conditions have been checked and you have power
between the Black and Brown wire, and the Orange and Black wires
at the circuit board and the damper does not operate replace the
controller.
Damper opens
and stops in the
open position but
appliance main
burner(s) does
not fire.
Wiring not connected
correctly.
No Voltage on Yellow wire.
Defective gas valve or
ignition control on appliance.
Make sure that the Yellow wire is connected to the correct position on
the Ignition Control Module.
Check the voltage between the Yellow and Black wire. This should be
the same voltage as the output of the transformer. If the voltage is zero
check the voltage at the circuit board between the Yellow and Black
wire. If the damper has stopped in the open position and there is no
voltage replace the controller.
Check for power at gas valve and/or ignition control. If present,
replace defective part. Make sure gas supply is turned on.
Damper rotates
continuously.
Defective damper controller. Replace controller.
Damper won’t close,
main burner off.
No power or insufficient
power at damper.
Obstruction preventing
damper blade from rotating.
Transformer power.
Defective damper controller.
Check for power at controller, only the Black and Brown wires should
be energized. If not, check wiring diagram. The voltage between the
Orange and Black wire must be zero for the damper to close.
Check for protruding screws or binding in pipe/blade assembly and
correct. Because the damper blade rotates in a complete circle, the
damper could open without any obstructions and still get caught on
something when closing.
Make sure that the power to the transformer is still energized.
If all of the above conditions have been checked and the damper still
will not close replace controller.