P43 room temp issues

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Wefdwgfd

New Member
Dec 21, 2015
10
New york
I have a harman p43 stove. When I attempt to run the stove in room temp mode the stove will not regulate the temperature. If I set it for 70 degrees I will wake up in the middle of the night to find it 80 degrees. On initial startup if I turn the temp setting down the status light goes out but if the stove has any heat to it I can turn it down to 50 degrees and it will just keep running. The temperature sensor, control board and esp have all been replaced trying to fix this problem. The temperature sensor is in the middle of the room approximately 5 feet off the ground. The stove is clean. I don't know what more to do. Help me please!
 

alternativeheat

Minister of Fire
Dec 19, 2013
3,802
Cape Cod, Ma.
What is the temp outdoors at night lately and are you running it in Room Temp Auto ( igniter on) or Room Temp Manual ( igniter off).
 

Bioburner

Moderator
Aug 4, 2012
7,317
West central Mn
Spent a night trying to figure out a similar problem about a week ago. Have you checked the outlet for correct polarity etc. These newer stoves electronics are a bit more fussy with the power source and if its not good it sets off a hard to diagnose problem or two.
Are you running with a surge suppressor or a good UPS? A newer UPS will detect issues with outlet.
 

Wefdwgfd

New Member
Dec 21, 2015
10
New york
Spent a night trying to figure out a similar problem about a week ago. Have you checked the outlet for correct polarity etc. These newer stoves electronics are a bit more fussy with the power source and if its not good it sets off a hard to diagnose problem or two.
Are you running with a surge suppressor or a good UPS? A newer UPS will detect issues with outlet.
I just checked the polarity and that's good. I tried a different outlet with a UPS and I get the same result.
 

Bioburner

Moderator
Aug 4, 2012
7,317
West central Mn
Never got how old of stove? And running for an hour probably not long enough to see if stove will act up
 

womaus

Feeling the Heat
Oct 25, 2015
498
Central MA
How far away is the temperature sensor? Have you extended the lead?
 

Bioburner

Moderator
Aug 4, 2012
7,317
West central Mn
Have you done the dollar bill test on the door gaskets? Sometimes a air leak can screw with the ESP
Cleaned and checked the fines box and got the cover on?
 
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bogieb

Minister of Fire
Oct 31, 2014
2,801
South Central NH
Is the stove giving you a real flame, or more of a maintenance burn (very low flame)? If it is more a maintenance burn that never goes out then there is probably an issue with the probe connection (or the extension connection); the stove never gets any input so it has no idea what to do and just does a maintenance burn. If you are getting reall flames (other than at, and just after start up), then that isn't the issue.
 

alternativeheat

Minister of Fire
Dec 19, 2013
3,802
Cape Cod, Ma.
Have you done the dollar bill test on the door gaskets? Sometimes a air leak can screw with the ESP
Cleaned and checked the fines box and got the cover on?
You bought a new probe, try hooking that up without the extension and see what happens then in room temp mode.
Edit: oops just realized I quoted the wrong message.
 

Wefdwgfd

New Member
Dec 21, 2015
10
New york
Have you done the dollar bill test on the door gaskets? Sometimes a air leak can screw with the ESP
Cleaned and checked the fines box and got the cover on?
I haven't tried the dollar bill test yet, I'll try it when I get home tonight and give you an update.
 

Wefdwgfd

New Member
Dec 21, 2015
10
New york
Is the stove giving you a real flame, or more of a maintenance burn (very low flame)? If it is more a maintenance burn that never goes out then there is probably an issue with the probe connection (or the extension connection); the stove never gets any input so it has no idea what to do and just does a maintenance burn. If you are getting reall flames (other than at, and just after start up), then that isn't the issue.
It's a real flame, full throttle.
 

Wefdwgfd

New Member
Dec 21, 2015
10
New york
Have you done the dollar bill test on the door gaskets? Sometimes a air leak can screw with the ESP
Cleaned and checked the fines box and got the cover on?
I did the dollar bill test and I have no issues there. I also double checked the fines box. I vacuumed out the fines and made sure it's seated properly. I still have the same issue.;?
 
You bought a new probe, try hooking that up without the extension and see what happens then in room temp mode.
Edit: oops just realized I quoted the wrong message.
X2, extended wires are sinking the signal. You want thin gauge wire for this and connectors that are millivolt compatible. Also, do t put the sensor on an exterior cool wall
 
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