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General Outdoor Furnace Discussion / Wood doctor he 5000

« on: January 06, 2014, 10:19:29 AM »

We bought a wood doctor he 5000 at an auction recently. There wasn't any type of owners manual or info with it (normal when buying from an auction).  Got it set up and running with no problems. Now the problem is getting the water temp up.  I've cleaned everything out. It gets up to temp for a short period of time. Everything seems to function right for a couple hours then it cools off and won't warm up. I have to put wood in about every 6 hours.  When it 40 degrees out it works great. At 0 it only heats the shop up to 50. It's a new building that is over insulated. 1800 square feet so the building size isn't the issue.   

At 0 degrees out the water temp in the furnace is only 90. Not sure what's not working or what to change anymore. Does anyone know what to do to get and keep the water temp up?