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Table C-3: A Troubleshooting continued from previous page.
Procedure Status Corrective Action
Indicator light is on. Replace cad cell bracket assembly. 11. Check cad cell bracket
assembly.
· Disconnect line voltage
power and open line
switch.
· Remove cad cell wires
from quick connect
connectors on the and
leave control leadwires
open.
· Apply power to device.
· Place jumper across cad
cell terminals after burner
motor turns on.
Indicator light is off. Replace R7184.
NOTE: Restricted Mode - (Limited Reset): In order to limit the accumulation of unburned oil in the combustion chamber,
the control can be reset only 3 times, after which, the control locks out. The reset count returns to zero each time
a call for heat is successfully completed.
To reset from RESTRICTED MODE: press and hold the reset button for 30 seconds. When the LED flashes twice, the
device has reset.
NOTE: Disable function: Pressing and holding the reset button will disable all functions until the button is released. The
will restart at the beginning of the normal heat cycle on SAFETY CHECK.
TABLE C-4: SYSTEM AND GENERAL TROUBLESHOOTING
Problem Possible Cause Remedy
Thermostat not calling for
heat.
Check thermostat and adjust. Also, check thermostat for
accuracy; if it is a mercury switch type, it might be off
level.
No power to furnace.
Check furnace switch, main electrical panel furnace fuse
or circuit breaker. Also look for any other hand operated
switch, such as an old poorly located furnace switch
which was not removed during furnace replacement.
Thermostat faulty.
Remove thermostat wires from oil primary control
terminals T-T. Place a jumper across T-T. If furnace
starts, replace thermostat, thermostat sub-base (if
equipped), or both.
Oil primary control faulty.
Check reset button on oil primary control. Remove
thermostat wires from oil primary control terminals T1 -
T2. Check for 24v across T -T. If no voltage is present,
check for 115v to oil primary control. If 115v is present,
go to Table C-3.
Photo Cell wiring shorted
or room light leaking into
photo cell compartment
Check photo cell (cad cell) wiring for short circuits. Also,
check for room light leaking into cad cell compartment.
Repair light leak if necessary. See Table C-3.
Furnace will not start.
Open safety switch. Check for open limit or auxiliary limit. Also, check internal
wiring connections; loose connectors, etc.
Continued on next page