Harman PF100 6 blink from hell

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miata91!

New Member
Feb 27, 2023
17
Miata91!!!!
So I have a Harman PF 100 furnace with a red probe and I have a 6 blink error code that I cannot seem to get fixed. I have recently replaced the motherboard and I have a 6 RPM auger motor on it. I have went through everything I can find on the forums and talking to a couple different companies. I do not appear to have any gaskets or seals leaking. I do not have a fresh air intake hooked up but The intake flapper is clearly operating. It seems to be feeding pellets perfectly fine. I’ve messed with the draft settings on the motherboard. I do not have a clog in anything that I can find. I’ve cleaned everything from the convection fan, the shaker chains, the burn pot, and the auger housing. I’m at a complete loss as to why it continues to blink. it usually flashes the error code and shuts down within 25 minutes to 2 hours, and it does not blow very warm air out the vents before shutting down. Any help or suggestions would be greatly appreciated!
 
A 6 blink status may be caused by several things. Blocked or partially blocked flue.2. Blocked or partially blocked inlet air. a. The backdraft damper on the inlet pipe may be stuck or closed. b. If the outside air is installed, the Termination Cap may be blocked. 3. The air chamber under the burn pot may be filled with fine sand small bits of ash.4. The holes in the burn pot may be getting filled with ash or carbon buildup. 5. Combustion blower fan blades may need to be cleaned. 6. There is no fuel in the hopper
 
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A 6 blink status may be caused by several things. Blocked or partially blocked flue.2. Blocked or partially blocked inlet air. a. The backdraft damper on the inlet pipe may be stuck or closed. b. If the outside air is installed, the Termination Cap may be blocked. 3. The air chamber under the burn pot may be filled with fine sand small bits of ash.4. The holes in the burn pot may be getting filled with ash or carbon buildup. 5. Combustion blower fan blades may need to be cleaned. 6. There is no fuel in the hopper
I’m very well aware of that. I can read my manual. I appreciate the input but I’ve gone through everything you just listed about eight times over.
 
What you have described is a heater lacking combustion air
The stove has an ask block somewhere or you have done a
reno to your home and it is very tight now
Have you tried the leaf blower trick?
 
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What does the flame look like while it is burning? It shouldn't be a lazy flame. It should have a blue color at the bottom of the flame and look like air is flowing quickly through the burn pot.

Are all of the holes clear in your burnpot? Have you cleaned out the fines area below the burnpot?
 
What does the flame look like while it is burning? It shouldn't be a lazy flame. It should have a blue color at the bottom of the flame and look like air is flowing quickly through the burn pot.

Are all of the holes clear in your burnpot? Have you cleaned out the fines area below the burnpot?
My boiler was running lazy when I fired it up for the first time this season. It turned out that I had neglected to clean the trap under the burnpot surface last spring. It was stuffed full of ash.
 
I’m not sure what the leaf blower trick is..
Using a leaf blower that has the vacuum feature you attach the vacuum part to your venting out side the house and SUCK all the ash out of venting and it sucks the ash out of nooks and crannies of your stove. The important part in that statement is SUCK not blow you need a leaf blower with vacuum feature.

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What you have described is a heater lacking combustion air
The stove has an ask block somewhere or you have done a
reno to your home and it is very tight now
Have you tried the leaf blower
I’m not sure what the leaf blower trick is..
Using a leaf blower that has the vacuum feature you attach the vacuum part to your venting out side the house and SUCK all the ash out of venting and it sucks the ash out of nooks and crannies of your stove. The important part in that statement is SUCK not blow you need a leaf blower with vacuum feature.

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would a shop vac work also?
 
would a shop vac work also?
No hot the volume or velocity of a leaf blower
The idea is to move as much air as possible through the stove to suck all the ash out
If you do it remember to open fire box door
 
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What does the flame look like while it is burning? It shouldn't be a lazy flame. It should have a blue color at the bottom of the flame and look like air is flowing quickly through the burn pot.

Are all of the holes clear in your burnpot? Have you cleaned out the fines area below the burnpot?
I’ve checked all the holes in the burn pot and cleaned the fines out from beneath the burn pot. The flame is fairly aggressive, but I don’t see much, if any blue flame.
 
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What you have described is a heater lacking combustion air
The stove has an ask block somewhere or you have done a
reno to your home and it is very tight now
Have you tried the leaf blower trick?
So I just tried the leaf blower trick and very little ash came out, so I really don’t think I have a clog anywhere. I have cleaned everything I can think of without taking the burn pot completely off.
 
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What is your feed rate set on? Have you cleaned out the compartment by the slide gate on the feed auger?

Have you tried different pellets?
 
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So I just tried the leaf blower trick and very little ash came out
Did you have a decent seal between leaf blower and vent? If you connected leaf blower at a clean out tee did you plug the vertical pipe so blower was pulling every thing from stove? I have used this "trick" on a lot of stoves that I thought were clean and I have never had a little ash come out always a impressive cloud at first.

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Did you have a decent seal between leaf blower and vent? If you connected leaf blower at a clean out tee did you plug the vertical pipe so blower was pulling every thing from stove? I have used this "trick" on a lot of stoves that I thought were clean and I have never had a little ash come out always a impressive cloud at first.

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Like I said, I’ve done a very thorough cleaning of this furnace, including the exhaust itself already I have not run the furnace very long at all. This is my first season with the furnace so I’m not surprised very little came out I taped my leaf blowers vacuum side to the exhaust and made sure it had a good tight connection and that it was sucking no air from anywhere but the exhaust. I had my burn chamber door open also
 
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What is your feed rate set on? Have you cleaned out the compartment by the slide gate on the feed auger?

Have you tried different pellets?
I have cleaned everything on the pellet furnace, including the auger slide gate. My feed rate is set to four. I’ve tried multiple different feed rates and no change.
 
That flame looks a little too vigorous. Maybe we are going about this
the wrong way maybe a little too much air. can you adjust it down a little
I know this is from Envrio but it shows a good flame
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That flame looks a little too vigorous. Maybe we are going about this
the wrong way maybe a little too much air. can you adjust it down a little
I know this is from Envrio but it shows a good flame
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It definitely would appear that I’m getting way too much air by the looks of that flame. I did a smoke test with a smoke bomb, blocking off the exhaust and closing the furnace and I did not see any smoke leaking out of any gasket or seal. I’m not sure where I would be getting too much air.
 
The manual talks about draft control but damed if I can find anything about it but may be like
most harmans a flap on the air intake. It may be stuck open