Harman XXV trouble shooting help...

[TedNH]

About a week ago my 3 year old Harman XXV began showing signs of trouble.
I have been unable to regulate the temp, fan speed or feed rate.
I could have the Room Temp set to 70* and the feed rate to 4, but the stove is pumping heat (room is 78*) and eating pellets at the rate of 2+ bags per day.

A call to the stove shop led me to remove the temp sensor probe and clean it. This didnt change the behavior of the stove. Today I purchased a new probe and installed it. Same results. I have noticed that when I touch the temp control knob, the stove will act differently, almost like the pot for the knob is bad or has come loose from the PC board.

Anyone have advice for me???

Thanks.

Ted

 

[rickwa]

sounds like board is shot

 

[rickwa]

if install was after todays date 2006 it is covered under warranty

 

[TedNH]

Purchased 8/06....
bummer.

I will call the stove shop in the am and price out a board.

 

[Lousyweather]

sounds like board is shot

agreed.....cracked leg on the potentiometer, most likely. Somewhere around $150

 

[603BOB]

My Harman Advance did that a couple of years ago - I popped the board out - replaced the cheap Spanish potentiometer with a less cheap Japanese pot - a 10 minute repair - it is fine now.

The potentiometers get intermittent from sitting in one spot.

They can sometimes be cured by just turning them from one end to the other about 20 to 40 times. This cleans the resistance element and the sliding contact.