Harman P68 Not Getting Enough Pellets

I have a 5 year old P68. Just recently the auger is not supplying enough pellets to sustain the fire. It shuts down on a low temp (Six Blinks) Auger drive has been replaced. No obstructions in flue. Gaskets appear good. Control board is turning it on and off. I starts out ok but about half way into filling the burn pot it starts going on and off. Only staying on for a second so burn pot never gest enough fuel. Changed brand of pellet, no change. Any ideas?

Hello
When things like this happen it seems to be the circuit board, Therefore I would replace the circuit board and also make sure your stove is plugged into a very good surge protector like a Tripp Lite brand.
Link to new circuit board.
https://www.eastcoasthearth.com/products/harman-oem-4-output-circuit-board-comes-w-3-knobs-and-3-knob-shafts-1-00-05886?_pos=1&_sid=7c9f78e57&_ss=r

So I did some more digging. I noticed that no pellets were coming out of the auger. I emptied the hopper and cleared of the slide plate. Put a light into the opening where the pellets slide to. Opened the fines cleanout door and looked for the light. Dark as night. Took a wire with a hooked end and started to pull out everything that was in there. Pulled out one pellet that was about 2 inches long. Then I took a shop vac on suction and vacuumed out top and bottom. I thin switched to blow and blew out from top. A lot of fines came out. Now i can see light through the cleanout door. Loaded some pellets into the hopper and put the stove into startup. I got good pellet delivery into the burn pot and ignition occurred as expected. I did however forget to remove the pellets that were already in the burn pot so the flame was intense. It caused a two light blink error. I let the the fire burn down and the error cleared. It came back a few minutes latter. I put the stove into shutdown and then unplugged it. Plugged back in, put in run mode and alarm was clear. It has been running now for 14 hours with no issues. So, if you get a six light fault and everything else checks out then clean the hopper and fines catcher on the side of the auger you normally don't look at. This will now be part of my end of season cleaning regiment.

Good work. That is a good thing to check
Thanks for letting us know.
The # 2 blinks means a vacuum issue, that could be a bad door or ash pan seal or a bad vacuum switch so if the stove is old then keep your eye on those parts too.

I’ve got a idc model 5660 and I’m picking up 1 and 4 code what causes this

Here are all the US Stove 5660 error codes I know
You can also call USSC and ask for tech support.

E1 - Overheat Alarm

E2 - Vacuum Alarm

E3 - Fire Off Alarm ie No Fire

E4 - Igniting Fail Alarm

E5 - Thermostat Sensor Alarm

Resolution for E3 - Fire Off Alarm - No Fire
The best solution for this issue is to completely blow out the ash traps with an air compressor!
 I found some more info on E3 error No Fire Off Alarm
Even though the stove is not exactly the same as yours, some info does apply.
One thing mentioned is not enough draft and I know at night the barometric pressure is low at night so on Heat Level one the fire may go out causing the E3 error. You could try opening the damper more if you have one or running on level 2. I know this can be an issue in hilly or more mountainous areas. Also an outside air kit can help. Cleaning the stove with a compressor to completely blow out the area in those ash trap doors at the bottom of the back wall in the firebox can help too.

Safety Features and warning code:

• Your heater is equipped with a temperature “high-limit” switch, designed to shutdown the auger in case of an over temperature situation. The high-limit switch is a thermo snap disc type and must be manually reset in the event of an overheat shutdown. Once the heater has cooled down, you can reactivate the high-limit switch by depressing the manual reset button located on the high-limit switch.
• When the High-Limit switch opens, which indicates an overheat failure, the HEAT LEVEL LED’s 3 & 4 will flash red.
• Your heater is equipped with a vacuum switch that automatically shuts down the auger in the event of a exhaust fan malfunction.
• When a Vacuum Error is sensed, the HEAT LEVEL LED’s 1 & 2 will flash red. Check to ensure the glass door is latched properly.
• When the Low-Limit switch opens, (fire went out) the HEAT LEVEL LED’s 4 & 5 will flash red. First check fuel supply, then check to ensure Auger is not jammed and finally that pellet hopper door is properly closed.
• When the Pellets in the Burn Pot fail to ignite HEAT LEVEL LED’s 1 & 5 will flash red. NOTE: In the event that the high-limit switch or vacuum switch activates, please contact your dealer to discuss the cause of this activation and to ensure that your heater continues to operate in a safe manner. Either switch tripping can indicate a problem with the operation of your heater.