harmon absolute p43 noise any time break vac seal

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nicu

New Member
Dec 17, 2020
9
new york
Just had installed on Tuesday any time I open door to scrape pan, load pellets or check ash pan as soon as seal is made not sure if there is a secondary fan but it sounds like a combination between fan blade hitting metal to something not engaging can be very loud will last anywhere from 30 sec to 2 mins before it stops sound pulses then everything seams normal any thoughts?
 

SciGuy

Feeling the Heat
Aug 17, 2007
334
Constableville, NY
Here is sound after I closed front door


Yikes!!!!!! It sounds like the combustion fan scraping its cover. You could shut the unit down, pull the ash pan and then combustion fan cover and see if it's marked up by the blower wheel scraping . If a dealer installed the stove he ought to come out and make things right.
 

nicu

New Member
Dec 17, 2020
9
new york
Yikes!!!!!! It sounds like the combustion fan scraping its cover. You could shut the unit down, pull the ash pan and then combustion fan cover and see if it's marked up by the blower wheel scraping . If a dealer installed the stove he ought to come out and make things right.
They will be here Monday . So question does that fan only run for a short while after you break vacuum? All other operation seem normal
 

SciGuy

Feeling the Heat
Aug 17, 2007
334
Constableville, NY
nicu,

The combustion fan should continue to run after you open the stove door. The pressure drop switch will turn off the auger feed when the door is open but the fumes from the currently burning pellets must continue to be exhausted or the house would be filled with fumes every time you cleaned the burn pot while a burn is going on. If one just left the door open permanently I suspect that the combustion fan would continue to run until the exhaust temperature dropped to 90*F as it does in a normal shut down. This is a safety feature not a bug in the system.
 

nicu

New Member
Dec 17, 2020
9
new york
Thanks for the info this is my first pellet stove, always had woodstove. So I have shut the stove down several times doesn't make noise then.
 

Ssyko

Minister of Fire
Nov 6, 2017
4,293
Lorraine NY
If I remember right the stove will sence a vacuum leak when the door is opened and will ramp up the combustion blower to evacuate smoke. Sounds like the blades are hitting the housing.
 

gfreek

Minister of Fire
Nov 5, 2010
1,470
WNYS
This is a new stove? What the heck ! Again, it's a good idea to ask the dealer to do a pre -burn before delivery . This may have been avoided.
Can this be similar, video included
Here's the video....

:
 

nicu

New Member
Dec 17, 2020
9
new york
This is a new stove? What the heck ! Again, it's a good idea to ask the dealer to do a pre -burn before delivery . This may have been avoided.
Can this be similar, video included


:
Yes just had installed Tuesday
 

gfreek

Minister of Fire
Nov 5, 2010
1,470
WNYS
Ok . Since it's under warranty have you contacted the dealer and their answer ?
 

gfreek

Minister of Fire
Nov 5, 2010
1,470
WNYS
Let us know the outcome , thanks
 
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gfreek

Minister of Fire
Nov 5, 2010
1,470
WNYS
There you go. Simple enough . Thanks for the update
 

fdirosa

New Member
Dec 25, 2021
2
New York
I just had a Harmon Absolute 43 installed December 22, 2021 and when I open the lid to put pellets in I hear the exhaust fan pick up speed then the loud scraping noise happens. Closed lid after a little while the scraping stops. I open the door when it is not burning pellets same thing with exhaust fan on. I took the exhaust cover off and did the same test and opening the pellet lid doesn't cause the scraping to occur anymore but when opening the door to the pellet stove it still does. This is a brand new stove. Is Harmon quality going down hill? They can't even install an exhaust fan correctly to avoid scraping. This seems like a defect in design since the exhaust fan blades are literally one hair thickness from the metal.
 

gfreek

Minister of Fire
Nov 5, 2010
1,470
WNYS
I just had a Harmon Absolute 43 installed December 22, 2021 and when I open the lid to put pellets in I hear the exhaust fan pick up speed then the loud scraping noise happens. Closed lid after a little while the scraping stops. I open the door when it is not burning pellets same thing with exhaust fan on. I took the exhaust cover off and did the same test and opening the pellet lid doesn't cause the scraping to occur anymore but when opening the door to the pellet stove it still does. This is a brand new stove. Is Harmon quality going down hill? They can't even install an exhaust fan correctly to avoid scraping. This seems like a defect in design since the exhaust fan blades are li
Time to call the dealer and have them service it. Again if they test fired it before delivery this may have been caught..
 

Mt Bob

Minister of Fire
Oct 31, 2013
3,666
park county montana
I just had a Harmon Absolute 43 installed December 22, 2021 and when I open the lid to put pellets in I hear the exhaust fan pick up speed then the loud scraping noise happens. Closed lid after a little while the scraping stops. I open the door when it is not burning pellets same thing with exhaust fan on. I took the exhaust cover off and did the same test and opening the pellet lid doesn't cause the scraping to occur anymore but when opening the door to the pellet stove it still does. This is a brand new stove. Is Harmon quality going down hill? They can't even install an exhaust fan correctly to avoid scraping. This seems like a defect in design since the exhaust fan blades are literally one hair thickness from the metal.
Anyone that has removed that cover could have bent the fan. The dealer,installer,etc. People sometimes do it when they clean their stoves. If you have removed that cover, could have been you. If the stove was dropped, it could have affected the motor mounts. The bottom line is the installer should have checked full functionality of the stove, if it is them you bought it from.
 

fdirosa

New Member
Dec 25, 2021
2
New York
Time to call the dealer and have them service it. Again if they test fired it before delivery this may have been caught..
They did the test fire. That didn't cause the issue. What causes the issue is when you open the hopper lid with exhaust fan on for a little while to get the RPM up then it makes the noise. They didn't do that. Definitely did not open the door when the fire is raging. Regardless. Why does the installer have to do the QA for manufacturing defects?
 

Mt Bob

Minister of Fire
Oct 31, 2013
3,666
park county montana
For the same reason all new vehicles go through a PDI, pre delivery inspection. with a through road test. They are paid to do it, to catch any manufacturing or assembly flaws.
 
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