All Pro heater shuts down after running for 20 minutes
I have an All Pro 110,000 BTU multi fuel heater. I checked the eye and drained the tank. If I run the heater with thecover off, it runs all day. When I put the cover back on, it runs for 20 minutes and then shuts off. Could the air stream be blowing out the flame?
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The white smoke is the kerosene fuel hitting the hot combustion chamber. Your flame has went out. The cause for this could be many. The first thing you need to do is check your fuel. Remove your fuel cap and look at the bottom of the tank for trash or water. Use a good flash light. It will all settle to the bottom. If so, drain and clean out your tank. Add fresh kerosene. Check your fuel filter. Replace if dirty. Test again. If problem continues, It is possible that your photo eye could be deffective or just dirty. It is located next to the ignitor or spark plug. It sees the flame. If the flame goes out, the unit shuts down. The flame has to be smooth (not sputtering). Water in the fuel will make it sputter and the unit will shut down. When the water/moisture in tank settles to the bottom, your suction fuel line is just off the bottom which results in it picking up the water instead of good fuel. Always disgard the old fuel from previous year and start with fresh fuel. This will cut down alot of your problems in the future.
If you brought the heater to my shop the absolute first thing I would do is shine a flashlight into the tank. Look for water droplets (or trash) rolling around the bottom of the tank. Keep in mind if there is a "layer" of water the light won't find it. Drain the tank if there is a "hint" of contaminants.
Next, I would check the fuel filter for stoppage or restriction.
These heaters have built in thermostats. Sometimes they are adjustable sometimes they are not, check to see if your is adjustable and see if this fixes your problem. Also check to see if there is any air restrictions possibly causing the heater to over heat.