Was wondering if anyone might know the answer to this question, I had to replace my control board (did replace with a new OEM one) now stove seems to come on even when the temp is set to 50 degrees and it is 72 in house and does once house reaches around 76-77 degrees begins it's ramp down and shut off mode. I decided for the heck of it to use my multimeter and test the resistance of the room temp sensor and at 72 degrees in the room it was reading over 7500 ohms which I thinking sounds high. Does anyone know what the sensor should read approximately and if so am I correct that my reading seems high? I did btw tested the resistance while holding the sensor in my hand and the readings di begin to go down but after maybe 2 minutes or so it only went down to 5900 ohms. If this isn't the issue could it maybe be a bad control board? I know with the old board I had to have the stove set to around 57 degrees to keep it 72 in the house so I know the temp sensor isn't the most accurate as I have used a laser temp gauge to check the area the room sensor was against the temp at my house thermostat and the areas were both reasonably close , oh and the reason for changing was the off setting on the stove temp/ room temp wouldn't always shut down the stove completely once coming home and the stove was running without the blower and cast was fiery hot.
Harman Accentra Room Temp Sensor Resistance?
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Ok so just for an fyi, I ordered a new room sensor and got it yesterday and allowed it to warm up in the house so that both probes where around the same temperature. The old sensor with the house at 71 degrees read approx 7910 ohm (or 7.91 K ohms) and then holding it in my hand for a few minutes to warm it up went down to 5290 (5.29 K ohms). The new sensor read 3600 (3.60 k ohms) and holding it for in my hand for a few minutes went down to 2890 (2.89 k ohms). So I saw a huge resistance difference between the two, I opened the door to the house allowing the room to cool to 70, put the new probe in and turned my stove on, since it was set at 50 degrees and the house was 71 the stove was off which was already a good thing as the old sensor would have come on and the flame once started would have been blazing. I turned it to 55, then 60, 65 & 70 and the stove still remained off so I set it just above 70 and it came on feeding pellets and firing up like normal heating the house to 72 degrees once it reached about 71 and kept the house there until morning. I did want to make sure the stove from a cold start with it below 70 if the it would flame higher and set the blower faster, so I opened the house this morning and let it cool to 67 and will turn on and see how it is when I fire it up.
Ok so all went well after letting the house get cold, stove fired up burn much higher and blower came on much faster and calmed down as it got closer to setting ran perfect.
Hope this helps someone out who might have the same issue as I when resistance testing the room sensor.
Hope this helps someone out who might have the same issue as I when resistance testing the room sensor.
Hi Bob, I've had my stove for quite a few years now and this year I'm having the same issue, last year I ran the temp at 69 degrees, and it kept the house comfortable I have been upping up the temp control enough to start it up but even today I turned the temp up to 75 degrees and it only ran for a little while. Did you find out exactly what your problem was? Thanks
I replaced my control board mainly because the potentiometer wasn't working correctly and sometimes wasn't shutting the unit down when turned to the off position and I came home a few times to the fire burning without the blower going so that needed replacing.
Once I replaced it I found that the unit wanted to fire up with the temperature set as low as it would go and the room well above, after checking the resistance of the room sensor I tried to find out what it should be and there wasn't much out there, since they are cheap enough I bought one and checked the resistance against the old one and they were well different, please see above post for my readings.
I found that the new one should read somewhere around 3500 ohms (this was I think with the room being around 70ish) and should go down when you warm it up, I just held it in my hand. If you have a multimeter you can do this by removing the sensor from the back of the stove and placing the leads across them set your meter to ohms and you should get the reading of your old sensor and if it is much higher than 3500 ohms it is probably time to replace, now this is for my Harman stove and I assume another brand should be somewhat similar.
Hope that helps you!
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