I have a 1998 non ignitor P61, which I'm trying to get running on room mode. The instructions are very vague on how it works. I can't get it too work. When I set it on room mode ( room temp is 82) turn it up to 82 the status light comes on. Below it goes off and completely shuts down in like 15 minutes no cool off. It has a the new board in it set up for manual light. Any idea what's going on? My understanding is that it should basically turn itself down ( not off) until it hits the desired temperature. Which in this case was 75. It just shut completely off both fans, with ambers still glowing. It as a result cooked the exhaust fan. I wondered off and came back to find this. I turned it back to stove mode it started back up feeding pellets the exhaust fan screaming away and it came back to life. Can some one who has an old model like mine help me out?
Old Harman P61 doesn't work on room mode
- Thread starter Spaz
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Whitenuckler
Minister of Fire
I just did a search for information on a control card/stove without an igniter (no LED light , no Switch, no igniter) and I can't find much.
I retried it again this morning. Left it on 5 (75) and then spun it from 1 to 7 status light stayed on. I was told the status light should not have gone off. Much warmer here today, so I'm going to play with it more. What's the next step? Or sign I should be looking for? It's 20 here climbing to 32 later. I'm going back to stove mode between tests. I'm putting a thermometer on top of the pellet bin to see what the actual temperature is there so I can compare later. I've also moved the external sensor to the floor behind the stove versus where it was hanging from a curtain rod just beside the stove. I'll be updating as I get new info. I realized that was probably a stupid place to measure at so I've moved it the floor right on top of the external sensor that way I can see what changes if any it does when I go back to room mode. I'm going to assume that if it's working it should follow that temperature when I go back to room mode which will be 75.
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Okay temperature at the sensor is 86-87. That's on 5. I'm assuming that the sensor has nothing to do with the heat produced on stove mode, just on room mode.
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Whitenuckler
Minister of Fire
Room temperature Mode
Most consumers use the stove in the Room Temperature Mode because it is the easiest and most efficient method of keeping the room at a given temperature. In the Room Temperature Mode, the Room Sensing Probe constantly monitors room temperature. As the weather changes outside and your home needs varying amounts of heat to be at a desired temperature, the stove will automatically increase fire size and heat output so that a constant even temperature is maintained. If the weather warms up and no heat is required, the stove will gradually slow down and hold at the minimum burn rate. When the house cools down, the stove will automatically bring the room temperature to the precise temperature you desire.
Found this in an old manual for a P38 which I believe is your control card version.
If you didn't get the hard copy manual for your stove, this should be pretty close.
Those cards are very old. I think they have had the igniter switch for a long time.
You should consider getting the newer card. You could still use a manual lighting scheme with no igniter.
Most consumers use the stove in the Room Temperature Mode because it is the easiest and most efficient method of keeping the room at a given temperature. In the Room Temperature Mode, the Room Sensing Probe constantly monitors room temperature. As the weather changes outside and your home needs varying amounts of heat to be at a desired temperature, the stove will automatically increase fire size and heat output so that a constant even temperature is maintained. If the weather warms up and no heat is required, the stove will gradually slow down and hold at the minimum burn rate. When the house cools down, the stove will automatically bring the room temperature to the precise temperature you desire.
Found this in an old manual for a P38 which I believe is your control card version.
If you didn't get the hard copy manual for your stove, this should be pretty close.
Those cards are very old. I think they have had the igniter switch for a long time.
You should consider getting the newer card. You could still use a manual lighting scheme with no igniter.
I have the new card, and the manual ( which is pretty useless) . Is my train of thought on track? Or should I wait for more info. I know how it's suppose to work I'm trying to diagnosis that it actually is working when I do it with out it suddenly shutting down again. And will the temperature at the sensor reflect the set temperature ( 75) or what it thinks it should be. It's showing 87 there set on 5 but that's not even close to the house temperature which is on average 75. Which I believe means that I'd have to set the temperature on room mode at 87. Or is it a game where you test a temperature setting until you find what works for the house? If I set it at 75 this house will be considerably colder that's 12 degrees lower which would means it will be some where in the low 60's at the same outside temp which is 22 now. I'm trying to not do that. Or should I set it at 85 which is the temperature at the sensor now? By monitoring that temperature I should see it drop fairly quickly and the fire die down? I've got 3 thermometers I'm working with, which are between 78 and 74. 2 are 15 to 20 feet away out of the direct heat the other is in the direct heat at 78.
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Whitenuckler
Minister of Fire
I'm just going to switch to room mode leave it at 5 (75) and go back in 10 minutes and see if the closest one has dropped, or stayed the same
No I don't. I'll find out in 10 minutes what it's doing, going down or staying the same, I don't want to lose any house heat. Stay tuned it won't be long. 😁
Whitenuckler
Minister of Fire
OK - There might be some confusion about what I am calling the new card. To me the lastest or new card has an igniter switch and LED light. That is the one you could get. Also, check what surge protection you use on your stove. A surge bar or plug should be used. If you get any work done on your house panel make sure they add "Whole Home 240V Surge Protection"
The card I got is a year old, no one mentioned that there's one that had those options on it and it won't work. It's still running though which is more then it did last time. It was built with a functioning room mode with out a ignitor can't see why I'd need one. But stay tuned it hasn't changed yet. Bills science experiment is still on. 👍
It's dropped 2 degrees so I'm back on stove temperature and you could definitely see its turned itself down. I'm thinking I need some one who owns one to get this figured out. The one furthest away also dropped 1 degree. It's turned itself up again after going back to stove mode. So I'm guessing I'd have to set it at 85ish to maintain the the same temperature. it's 25 out there now. That being said I d have to run it on 85 just to maintain these temps which doesn't sound right. I've turned it to 85 and switched it back to room mode and see what happens. Better to add heat then lose it.
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Whitenuckler
Minister of Fire
I see what you mean by "new". I think they sold you some older revision card they had in storage. I would not be happy.
K it hit 80 already, so I've set it for 77 which is where it usually is for my desired internal temp on that thermometer. I was at 77 when I started.
What can I say. 🤮
It's appears to be working, that is it's dropping and gaining temp. So I'll continue to experiment to find the desired temperature that works for me which is 73-74. Temp outside is now 26. I'll give it an hour to stabilize and get back to you
Well bad news, it hit 77 on that thermometer and status light was off and was almost shut down. So back to stove mode. Fans were still running though. Just ambers burning in the pot. So it seems it won't idle, it turns off which makes no sense. The tech said that's what it will do. How can it have a room mode and turn off, not idle.?
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Whitenuckler
Minister of Fire
For sure that card is bad. Get it replaced under warranty (or try). If they try to tell you they sold you the correct card, tell them you expected the newer card in case you wanted to install an igniter.
I actually called and talked to the parts guy and he claims it's the right one. Like an hour ago. The tech is calling me Monday.
![[Hearth.com] Old Harman P61 doesn't work on room mode](/talk/data/attachments/343/343308-873769990bdac4d9b750c47437dcd240.jpg?hash=LPxANG6HHe)
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Whitenuckler
Minister of Fire
Good news I think. I went down and set my stove in room mode, igniter auto, then turned the temp dial down. The status light went out.
Do you remember the dipswiches? Review the chart again:
Harman Pellet Stove DIP Switch Settings Explained
If you own a Harman pellet stove, you may have heard about DIP switches. These tiny switches are located on your control board and act like the “settings menu” for your stove. They tell your stove how to ignite, how much fuel to feed, and even which temperature sensor (ESP probe) it should...
www.northeastpelletstoves.com
You stove think's it has an igniter set to auto which is why it is shutting off.
However - the combustion blower should stay running until the stove cools.
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