Effective: January 2020
6
F-35-53-CE
TROUBLESHOOTING
Note:
The code will repeat every 3 seconds. Removing
power from the control will clear the fault code.
Internal Control Failure
If the control detects a software or hardware error, all outputs
are turned off and the red LED displays a Steady On condition.
If this condition persists after an attempt to restart, then the
control must be replaced.
WARNING
Risk of Explosion or Fire
The 35-53CE control cannot be serviced by the
user. If any control faults are detected, the 35-53
control must be replaced by qualified service
personnel. Risk of explosion or fire can result if
the control module has been opened or with any
attempts to repair it, and the warranty is void.
Troubleshooting Guide
Symptom
Recommended Actions
1. Dead
A. Miswired
B. Transformer/battery fault
C. Fuse/circuit breaker fault
D. No voltage at PWR or AIR
E. Bad control
2. Thermostat on - no blower
output
A. Miswired or failed air flow
switch
B. Faulty thermostat, no
voltage at thermostat
terminal TH
C. Faulty control
3. Airflow Switch input okay, but
no TFI after purge delay
A. Miswired
B. Faulty control
4. Valve on, no spark
A. Valve coil open
B. Open valve wire
C. Faulty control
(check voltage between V1
and GND)
5. Flame okay during TFI, no
flame sense (after TFI)
A. Faulty electrode
B. Faulty HV wire
C. Poor ground at burner
D. Faulty control (check flame
current)
Fault Conditions - Red diagnostic LED
LED Indication
Fault Mode
Off
Normal
Steady On
Internal Control Failure
1 flash
Airflow / Limit Fault
2 flashes
False Flame
3 flashes
Ignition Lockout Fault
5 flashes
Low Voltage Fault *
*
Low Voltage Fault is below 8.7 VDC
