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Old 08-09-2010, 02:37 PM
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moe1942 moe1942 is offline
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Originally Posted by Paychk View Post
May be some kind of safety that wont ignite the burner, till the water is flowing through the heating coil.

Makes good sense..
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Old 08-09-2010, 09:32 PM
NC Fabricator25 NC Fabricator25 is offline
Join Date: Jul 2009
Location: Near Charlotte, NC
Posts: 151

Thanks for all of the input guys. I think I'm going to source out a new unloader valve. How specific do these need to be? If it specs with the right gpm and psi range, and has the correct fitting size am I good to go?

Regarding the burner, I'll check for an optical eye that's dirty (I had not thought about that), that makes sense. I know the fan is working and the pump is atomizing and spraying the diesel out, I'm just not getting ignition. I'll also clean the electrode tips off with 400 grit sandpaper. Then I'll start trouble shooting the electrical.


Good eye there, and you're right. I just put those brass fittings on because the old galvanized steel fittings were severly corroded. The thermostat has a copper pigtail that extends about 4" into that brass nipple to capture the water temperature.....and ideally I could have used a 2-1/2" long nipple added to the other fittings, but all I could find was a 4". The temperature is adjustable up to 200F, but you have to remove the blank cover plate off the thermostat. I don't think this is causing my issues, but it does stick out too far and is begging to get snagged on something.

Thanks again, and I'll update the thread when I have a chance to fiddle with it some more, it may be this upcoming weekend.

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Old 08-09-2010, 10:14 PM
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Floptop Floptop is offline
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I had the same thing with my Kartcher, fuel flow but no flame. Checked spark, cleaned and adjusted electrodes etc. etc. etc. Wasted half a day, then drained the accumulated water from the fuel tank and magically had hot water again.
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Old 11-04-2010, 09:19 AM
NC Fabricator25 NC Fabricator25 is offline
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Edit to original post with solution to problem............thanks for everyone's help!

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