Could end up being the problem, check to see if it is tight were it bolts onto the exhaust blower housing and unplug and replug on the board (circled in red) to see if has good connection. Inspect wire from board to exhaust housing. White wires with cloth covering.
View attachment 303700View attachment 303701
What happens if you set Heat Range to Hr 1 does it stop blinking?
You also could run the board test and see what number 7 says, stove must be cool to run this test:
5500M 4 Digit Control Board Test
To run this test the UNIT MUST BE COOLED OFF. Power up the unit by plugging in the power supply cord
to the back of the unit. Press the on button and the circuit board then press and hold the Off and Auger
Delay buttons simultaneously for 3 seconds. To advance through the test press the on key. If the Heat
Range Light is on during every test check Hopper Switch Wires.
1. Exhaust Fan Output Test- The display will show “drift”. The exhaust fan is turned on full then
reduced to a level just above the typical minimum pressure switch setting. The ON LED indicates
whether the pressure sensor is detected. If the pressure switch is not detected, the fan ramps to full
on for two seconds then returns to the previously established level if the pressure switch closes. If
the Draft Fan Fuse is not blown and the fuse detection circuit is functioning, the Draft Fan LED will
be lit and the other three top row LEDs will be off.
2. Room Fan Output Test – The display will show “rfan”. The room fan is turned on full. If the Room
Fan Fuse is not blown and the fuse detection circuit is functioning, the Room Fan LED will be lit and
the other three top row LEDs will be off.
3. Igniter Output Test – The display will show “ignt”. The igniter motor is turned on full. If the Igniter
(AUX) Fuse is not blown and the fuse detection circuit is functioning, the AUX LED will lit and the
other three top row LEDs will be off.
4. Auger Output Test – The display will show “augr”. The auger motor is turned on full. If the auger
fuse is not blown and the fuse detection circuit is functioning, the Heat Range LED will be lit and the
other three top row LEDs will be off.
5. Hopper Switch Test – The display will show “hppr”. If the hopper switch is open (lid is open), the ON
LED will turn on otherwise, it will be off. If the hopper switch is wired in series with the auger, this
test is not valid, and the validation of the hopper switch should be done in the previous Auger
Output test.
6. Thermostat Input Test – The display will show “stat”. If the thermostat input is closed, the ON LED
light will be on, otherwise it will be off.
7. Flue gas Thermistor Test – The display will show the fluegas temperature in degrees F. This should
read 54° F
8. AC Frequency Test - Displays the measured AC frequency in hertz followed by the letter “H”.
This should read 59, 60, or 61H
9. Watchdog Reset – The Watchdog timer is tested to ensure that the board can be reset. The message
“BYE” will be displayed until the Watchdog resets board.