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I have a 200000 btu master torpedo heat that has a new , coil,spark plug,eye,fuel valve, the unit has spark fuel but doesn`t fire it looks like it wants to but will not can anybody help me

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All torpedo heaters have a mind of their own and will work perfectly for any number of cycles then become contrary as can be. It's usually a slight adjustment of pressure or a tweak of the angle of the cad cell....something simply overlooked. Sometimes just a slight movement of the fan blade forward or backward on the shaft is enough to make it light off. There are some specific tools reuired to get ACCURATE pressure adjustments. I'd suggest downloading a unit specific manual and read it thoroughly.

Posted on Dec 11, 2014


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Have master heater 200000 btu that has spark an fuel but will not fire can someone help me

If this is a fuel oil burner in a residential style forced air furnace, you probably have the electrode adjustment wrong. The generic measurements for the electrodes for an 80 degree hollow fuel flow atomized mist spray is 9/16" above the center of the nozzle, 1/8" gap, with a leading dimension of 1/8". Because the atomized mist leaves the nozzle at an 80 degree angle, electrodes protruding too far out will be drowned out by the fuel and not ignite. Electrodes not extending out far enough may cause a serious delayed ignition that will rock the structure, or not light at all because if the cad cell doesn't react to the UV rays of a flame, it locks out the ignition control.

When in doubt, its always back to basics first. If this is a torpedo style heater, it may or may not utilize the two electrodes for ignition as noted above and may just use a spark plug style ignition device, in which case the above dimensions are rendered useless.

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It may be the spark plug (or the ignition module). On my Reddy Heater 50K BTU, there are six metal screws that join the top of torpedo tube to the bottom. Remove these,and the top of the tube casing. The spark plug should be in plain sight.

Turn the unit on and look for spark. If it's not firing, replace the plug. If it still doesn't fire, you may need to replace the ignition module (it's what is "connected to the spark plug via the fat ignition wire.")

Hope this helps,

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