Great vid but I have a few Qs: 1) my approximately 10-11 year-old Harman Accentra-2 stove had been running fine in October for a couple weeks when suddenly it made a pop/thud noise and completely shut off, the auger motor and both fans. I bypassed the vacuum switch and sure enough, it's running great once again. But it sounds like only the auger motor should stop when the switch trips? If so, I am puzzled why my stove completely shut off. 2) My switch only has two prongs and one connector for the tube. Part number 3-20-6866. How do I correctly test it? 3) My switch is mounted horizontally, exactly like you say it shouldn't be. Why would that be? Thank you for any assistance!
Thanks for contacting us. 1. The vacuum switch is only electrically in line with the auger feed motor. Unless the wires coming to the switch or one of the prongs grounded out on the stove somewhere, I don't see how the vacuum switch could have caused all your motors to shut down. We would suggest getting a good flashlight to check all the component wires and connections. 2. Your vacuum switch is negative pressure, Negative nozzle port. Follow that in the video here to test. 3. Wouldn't be sure if it's the original switch and mount. Over the years Harman has made changes to both the switch and mount style. If you do end up getting a replacement switch, we would recommend the switch is mounting vertical for best performance. Quick Question: Was the status light blinking on the control board when everything shut off? Keep us posted. Happy to help.
My auger feed on my P61 Harman stove will not work. I have bypassed the vacuum switch and the auger works. I have another P61 stove with a functioning switch that I borrowed and installed on the problem stove. Still no luck. My door gaskets are good and I have thoroughly blown out and cleaned the stove and vent pipes. I even blew compressed air into the vacuum tube. After watching this video I am wondering if I have a problematic tube. It is good as far as I can see it but I am not sure how the other end goes into the stove and how to replace it. Can you give an idea or do you have some other suggestion?
Thanks for contacting us. It depends on the year of the P61, but with most the vacuum switch tube goes from the switch into the feed system housing. There may be silicone around it holding the tube in place which will need to be cut to pull it out. Let us know what yours looks like. If you do pull it out, important to make note of how much of the tube was in the feed housing. Glad you checked the vent pipe, door, glass, and ash pan door gaskets, be sure to check the hopper gasket as well. It can also be good to make sure the combustion fan is operating at proper voltage during start-up to lock in the vacuum switch. It should be near line-voltage on start-up. Keep us posted, happy to help!
I am experiencing a condition on my Harman Accentra 52i-TC (2022) where it just stops feeding pellets and starts flashing "hopper lid open". While this is is flashing, the diagnostic screen still shows "Pressure switch closed". No visible issues with the hopper lid gasket or front door gasket. No visible hopper lid door switch. The wiring diagram on the machine only refers to a "pressure switch" and no vacuum switch. What could be causing this? I would think if the draft was inadequate, or there was a door gasket leaking, the pressure switch would show "open" on the diagnostic screen.
Thanks for contacting us Dustin. Yes, in your 52i-TC it will be called a pressure switch not a vacuum switch. There is a tilt switch inside the display screen that could be causing the issue here. We believe there is a calibration setting for it, but it may be the display screen itself. Here is the direct number for Harman Customer Support. They should be able to provide some options here for further troubleshooting to get you back up and running. 800.664.3119. Hope that is helpful, keep us posted.
@@EarthSense Thank you for your reply! That is exactly what fixed it. Shortly after posting, I had recalled seeing posts somewhere about the hidden "dealer settings" on the Harman Accentra TC model and figured out the quasi-secret way to get back into that menu. Then I found the "Lid Calibration" page therein. All I had to do is re-calibrate it and voila! Fixed. Amazing that there is ABSOLUTELY NOTHING about this online. I found ONE reference to the setting on a page for a replacement hopper lid gasket on a 3rd party replacement parts retailer, buried on the page. All I could find is people saying this was probably an issue with the pressure switch (but mine was still reading "closed" on the display).
@@dustinriordan7051 Most excellent Dustin! So glad to hear you were able to get in there, access, and adjust - more importantly you are back up and running again! If anything else comes up keep us posted, always happy to help!
Hey Jim, I just left a comment on the other post for you. Thanks for confirming you have replaced the control box. I think we either have an issue with the thermostat terminal block or we have an issue with the Junction Box wiring harness where the control box slides into. See the other comment I left and keep us posted. Happy to help. Thanks.
Where does the power come from and what determines the power for the pressure switch? Quadrafire 1200 pellet stove has no power to the switch. Blower motors all work snap discs are working no power to the thermostat
Thanks for contacting us. There is no power supply to the pressure switch. As the diaphragm opens and closes with pressure or vacuum it simply creates or breaks the circuit to the auger feed motor. I saw your second message and will respond to that as well. Thanks.
@@EarthSense there are two wires connected to the pressure switch when there is pressure it should connect the two wires completing the circuit. Where does the power come from for that wire? I know out of the brain box but something Elsa makes that determination? I have no power at the vac. Switch
@@JimHaskell-es8pe Hey Jim, the wires that run to the pressure switch will go into the junction box wire harness assembly where your control box plugs into. Unless the wire was loose inside the junction box, the control board/brain box is providing the electrical signals. We have run across issues before with the junction box, although not that common and it usually has to do with the receiving end for the control box.
Yes, you can certainly bypass for troubleshooting, however we never want to leave a safety switch bypassed. I will include a link here below that will show you how to make a jumper wire to do so. Keep in mind that even if the auger works when bypassed, it may not be the switch itself. Any air loss or air blockage can cause the switch to stay tripped. Checking ohms on the switch will let you know if the switch is good or bad. From there, if it is good we can check the other areas that may be causing the switch to trip. Happy to help if needed. Creating a Jumper Wire: th-cam.com/video/FDVkbsHS95U/w-d-xo.htmlsi=-zfm8vIUsIl9Ohw8
Great vid but I have a few Qs: 1) my approximately 10-11 year-old Harman Accentra-2 stove had been running fine in October for a couple weeks when suddenly it made a pop/thud noise and completely shut off, the auger motor and both fans. I bypassed the vacuum switch and sure enough, it's running great once again. But it sounds like only the auger motor should stop when the switch trips? If so, I am puzzled why my stove completely shut off.
2) My switch only has two prongs and one connector for the tube. Part number 3-20-6866. How do I correctly test it?
3) My switch is mounted horizontally, exactly like you say it shouldn't be. Why would that be?
Thank you for any assistance!
Thanks for contacting us.
1. The vacuum switch is only electrically in line with the auger feed motor. Unless the wires coming to the switch or one of the prongs grounded out on the stove somewhere, I don't see how the vacuum switch could have caused all your motors to shut down. We would suggest getting a good flashlight to check all the component wires and connections.
2. Your vacuum switch is negative pressure, Negative nozzle port. Follow that in the video here to test.
3. Wouldn't be sure if it's the original switch and mount. Over the years Harman has made changes to both the switch and mount style. If you do end up getting a replacement switch, we would recommend the switch is mounting vertical for best performance.
Quick Question: Was the status light blinking on the control board when everything shut off?
Keep us posted. Happy to help.
Great video, and very easy to understand. Thank you
So glad to hear it was helpful, thanks!
My auger feed on my P61 Harman stove will not work. I have bypassed the vacuum switch and the auger works. I have another P61 stove with a functioning switch that I borrowed and installed on the problem stove. Still no luck. My door gaskets are good and I have thoroughly blown out and cleaned the stove and vent pipes. I even blew compressed air into the vacuum tube. After watching this video I am wondering if I have a problematic tube. It is good as far as I can see it but I am not sure how the other end goes into the stove and how to replace it. Can you give an idea or do you have some other suggestion?
Thanks for contacting us. It depends on the year of the P61, but with most the vacuum switch tube goes from the switch into the feed system housing. There may be silicone around it holding the tube in place which will need to be cut to pull it out. Let us know what yours looks like. If you do pull it out, important to make note of how much of the tube was in the feed housing. Glad you checked the vent pipe, door, glass, and ash pan door gaskets, be sure to check the hopper gasket as well. It can also be good to make sure the combustion fan is operating at proper voltage during start-up to lock in the vacuum switch. It should be near line-voltage on start-up. Keep us posted, happy to help!
I am experiencing a condition on my Harman Accentra 52i-TC (2022) where it just stops feeding pellets and starts flashing "hopper lid open". While this is is flashing, the diagnostic screen still shows "Pressure switch closed". No visible issues with the hopper lid gasket or front door gasket. No visible hopper lid door switch.
The wiring diagram on the machine only refers to a "pressure switch" and no vacuum switch.
What could be causing this? I would think if the draft was inadequate, or there was a door gasket leaking, the pressure switch would show "open" on the diagnostic screen.
Thanks for contacting us Dustin. Yes, in your 52i-TC it will be called a pressure switch not a vacuum switch. There is a tilt switch inside the display screen that could be causing the issue here. We believe there is a calibration setting for it, but it may be the display screen itself. Here is the direct number for Harman Customer Support. They should be able to provide some options here for further troubleshooting to get you back up and running. 800.664.3119. Hope that is helpful, keep us posted.
@@EarthSense Thank you for your reply! That is exactly what fixed it. Shortly after posting, I had recalled seeing posts somewhere about the hidden "dealer settings" on the Harman Accentra TC model and figured out the quasi-secret way to get back into that menu. Then I found the "Lid Calibration" page therein. All I had to do is re-calibrate it and voila! Fixed. Amazing that there is ABSOLUTELY NOTHING about this online. I found ONE reference to the setting on a page for a replacement hopper lid gasket on a 3rd party replacement parts retailer, buried on the page. All I could find is people saying this was probably an issue with the pressure switch (but mine was still reading "closed" on the display).
@@dustinriordan7051 Most excellent Dustin! So glad to hear you were able to get in there, access, and adjust - more importantly you are back up and running again! If anything else comes up keep us posted, always happy to help!
V helpful 🎉
I have replaced the control box
Hey Jim, I just left a comment on the other post for you. Thanks for confirming you have replaced the control box. I think we either have an issue with the thermostat terminal block or we have an issue with the Junction Box wiring harness where the control box slides into. See the other comment I left and keep us posted. Happy to help. Thanks.
Thank you!
You're most welcome! If you need anything else please let us know!
Where does the power come from and what determines the power for the pressure switch? Quadrafire 1200 pellet stove has no power to the switch. Blower motors all work snap discs are working no power to the thermostat
Thanks for contacting us. There is no power supply to the pressure switch. As the diaphragm opens and closes with pressure or vacuum it simply creates or breaks the circuit to the auger feed motor. I saw your second message and will respond to that as well. Thanks.
@@EarthSense there are two wires connected to the pressure switch when there is pressure it should connect the two wires completing the circuit. Where does the power come from for that wire? I know out of the brain box but something Elsa makes that determination? I have no power at the vac. Switch
@@JimHaskell-es8pe Hey Jim, the wires that run to the pressure switch will go into the junction box wire harness assembly where your control box plugs into. Unless the wire was loose inside the junction box, the control board/brain box is providing the electrical signals. We have run across issues before with the junction box, although not that common and it usually has to do with the receiving end for the control box.
I have replaced the control box and still the same no power
Can I by pass it to see if it's bad
Yes, you can certainly bypass for troubleshooting, however we never want to leave a safety switch bypassed. I will include a link here below that will show you how to make a jumper wire to do so. Keep in mind that even if the auger works when bypassed, it may not be the switch itself. Any air loss or air blockage can cause the switch to stay tripped. Checking ohms on the switch will let you know if the switch is good or bad. From there, if it is good we can check the other areas that may be causing the switch to trip. Happy to help if needed.
Creating a Jumper Wire: th-cam.com/video/FDVkbsHS95U/w-d-xo.htmlsi=-zfm8vIUsIl9Ohw8
Thank you
You are most welcome@@vickilewerenz7061
If you have any future questions or needs please let us know!