Harman p43 not feeding long enough

[C4boom]

I have a harmen P43 stove. Light's fine gets going throttles up. Then for some reason, it does not feed aggressively enough, it keeps a small fire in the pot even when turned up all the way. The level 7 or with the temperature, the probe turned all the way up to 90° it does not feed excessively aggressive. It used to feed and have a very large fire in the box. And heat up the house quite well.

So far, I have taken the ESP probe out and cleaned it with no change.

Thank you for your time.

 

[Whitenuckler]

I have a harmen P43 stove. Light's fine gets going throttles up. Then for some reason, it does not feed aggressively enough, it keeps a small fire in the pot even when turned up all the way. The level 7 or with the temperature, the probe turned all the way up to 90° it does not feed excessively aggressive. It used to feed and have a very large fire in the box. And heat up the house quite well.

So far, I have taken the ESP probe out and cleaned it with no change.

Thank you for your time.

Does it act the same in stove mode? Stove mode would be the mode where it is just based on internal temperature. Say, stove mode, feed rate 4, setting of 4. Also, can you verify it is cold in the room without the stove running? Can you also look at the LED light for the feed/auger. How many seconds does the light stay on, and then time to the next feed cycle.

 

[C4boom]

Does it act the same in stove mode? Stove mode would be the mode where it is just based on internal temperature. Say, stove mode, feed rate 4, setting of 4. Also, can you verify it is cold in the room without the stove running? Can you also look at the LED light for the feed/auger. How many seconds does the light stay on, and then time to the next feed cycle.

Yes, it's actually worse in stove mode. If I put it on stove mode, Max setting, the flame is less than room temp mode. I counted it out on Max setting 6. I'm getting about 25 seconds worth of feed. Rate on room mode and I'm getting about 22 to 23 on stove mode.

 

[Whitenuckler]

Yes, it's actually worse in stove mode. If I put it on stove mode, Max setting, the flame is less than room temp mode. I counted it out on Max setting 6. I'm getting about 25 seconds worth of feed. Rate on room mode and I'm getting about 22 to 23 on stove mode.

Do you have unburnt pellets?

 

[Whitenuckler]

I am signing off, but I think you need to check your air supply circuit starting from outside (if you have OAK) all the way past the flapper and the combustion blower. If you have pellets, and no fire, what you need is air, and a good vacuum (flow).

 

[C4boom]

I am signing off, but I think you need to check your air supply circuit starting from outside (if you have OAK) all the way past the flapper and the combustion blower. If you have pellets, and no fire, what you need is air, and a good vacuum (flow).

So I checked the stove with The draft meter it's within spec. I don't have an external air supply. It pulls from in the house

 

[C4boom]

Do you have unburnt pellets?

No burning well just not feeding fast enough.

 

[bogieb]

A couple of things to check:

Make sure the room probe is well seated into the back of the stove. I've had it loosen up before on the P61aand couldn't figure out why it basically went into maintenance mode after starting up. If it is not seated well, the stove gets confused and doesn't know what to do so just feeds at a slow rate. Once I pushed the connecter so it was firmly seated, the issue went away.

Make sure the business end of the room probe isn't too close to the stove, or otherwise been moved. I have mine looped around the panel door (with door open). Apparently one of the cats brushed by it and closed the door somewhat - resulting in the probe getting heat from the stove instead of room air.

Make sure the feeder speed is set at 4 (although maybe you did this - I'm unclear about whether you were mentioning just the temp knob or both in your description).

Hope you get it figured out!

 

[C4boom]

A couple of things to check:

Make sure the room probe is well seated into the back of the stove. I've had it loosen up before on the P61aand couldn't figure out why it basically went into maintenance mode after starting up. If it is not seated well, the stove gets confused and doesn't know what to do so just feeds at a slow rate. Once I pushed the connecter so it was firmly seated, the issue went away.

Make sure the business end of the room probe isn't too close to the stove, or otherwise been moved. I have mine looped around the panel door (with door open). Apparently one of the cats brushed by it and closed the door somewhat - resulting in the probe getting heat from the stove instead of room air.

Make sure the feeder speed is set at 4 (although maybe you did this - I'm unclear about whether you were mentioning just the temp knob or both in your description).

Hope you get it figured out

I'll check the seating on the probe tomorrow. During the day but the probe is about 20 feet away using
The thermostat wire ( it has been set up like that for the last 6 years.)

as far as this feeder speed nob, it doesn 't matter if I set it at 4 or 6 technically 6 sould feed a max longer , it only runs about 15-20 seconds at most.(usually will feed for 40-50 Seconds)

 

[NS P-68]

Make sure your ESP hasn't come loose from the board or that the wire hasnt been damaged.
It sounds like an ESP issue...especially since it seems to run worse in stove mode.

 

[Whitenuckler]

I'll check the seating on the probe tomorrow. During the day but the probe is about 20 feet away using
The thermostat wire ( it has been set up like that for the last 6 years.)

as far as this feeder speed nob, it doesn 't matter if I set it at 4 or 6 technically 6 sould feed a max longer , it only runs about 15-20 seconds at most.(usually will feed for 40-50 Seconds)

Do all your troubleshooting in Stove Mode to eliminate the room sensor. In stove mode, can you measure the stove temp with everything turned to max after 30 minutes. Keep the room blower off (igniter sw down).
Are you using the same pellets as before?
Let it run out of pellets, and try and see if your auger teeth are clear.
Double check the fines cavity and seal plate, the burn pot holes, and the igniter cavity is clean.
Make sure the hopper lid seals are clean ect.
Inspect the air flapper. If you draw from the house and have pets you are sucking dirty air through your stove. I'd install OAK.
You could try the "Leaf blower trick"

 

[Whitenuckler]

No burning well just not feeding fast enough.

As mentioned, check the ESP wiring, and then after that put a new one in. Your feed times seem good ie 22 seconds, then off for 10S ? so it does not make sense. Later I will put mine on stove mode at max and write down the auger run and dwell times.

 

[Whitenuckler]

I'll check the seating on the probe tomorrow. During the day but the probe is about 20 feet away using
The thermostat wire ( it has been set up like that for the last 6 years.)

as far as this feeder speed nob, it doesn 't matter if I set it at 4 or 6 technically 6 sould feed a max longer , it only runs about 15-20 seconds at most.(usually will feed for 40-50 Seconds)

40-50 second feed time is way too high. It would be feeding pellets almost continuously. I'd have to look it up, but running for 20-25s every minute is max think.